SABIIA - Sistema Aberto e Integrado de Informação em Agricultura (Sabiia)

Hinojosa-Garro,Demián; Arceo-Gómez,Joselito; Zambrano,Luis; Escalera-Vázquez,Luis H..

We compared fish diet composition between permanent (P) and semi-permanent (SP) pools in Petenes Biosphere Reserve (PBR), Campeche. A total of 445 gut contents were examined to determine stomach relative fullness (RF), fish diet as index of niche breadth (INB) and diet overlap. In SP pools, species showed a RF of 1.66 (57.20 % empty stomachs) whereas in P pools, the RF was 2.91 (31.16%). We classified fish diet into six trophic groups: detritivorous, herbivorous-detritivorous, insectivorous, piscivorous, omnivorous and malacophagous. Species in P pools were found to be specialist. Conversely, species present in both habitats shifted to generalist patterns. There was a 54.0% dissimilarity in fish diet composition between pools. From all items identified,...

The contribution of environmental factors to fish assemblages in the Río Acahuapa, a small drainage in Central America

Palavras-chave: Campeche; Feeding ecology; Freshwater fish; Mexico; Petenes Biosphere Reserve.

Ano: 2013

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252013000400881

Álvarez,Francisco S.; Matamoros,Wilfredo A.; Chicas,Francisco A..

ABSTRACT The ichthyofauna of the Río Acahuapa was analyzed sampling 17 sites that included the basin main channel and its tributaries. Fish were collected using dip-nets, seine-nets and electrofishing. Fish standard length and species abundance were recorded. Species origin and salinity tolerance criteria were used to classify fish species. Water physicochemical variables, habitat structure and sampling sites elevation were recorded. A total of 33 fish species were registered, 12.1% are primary, 45.5% are secondary and 42.4% are of marine derivation. Fish species richness declined with increase of elevation (R2=0.55, p=0.0006). Two assemblages of fishes were identified: the first one associated to sites of low elevations (19-184 masl), composed mainly of...

Myxiops aphos, new characid genus and species (Characiformes: Characidae) from the rio Lençóis, Bahia, Brazil

Palavras-chave: Community structure; Fish ecology; Freshwater fish; Habitat structure; Tropical streams.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000300213

Zanata,Angela M.; Akama,Alberto.

Myxiops aphos, new genus and species, is described from a river in the eastern portion of Bahia State, Brazil. Myxiops is distinguished from all other characid genera by the combination of the following features: infraorbitals fused in a unique fashion, resulting always in less than six autogenous bones; a single tooth row in the premaxilla; presence of somewhat pedunculate teeth, expanded and compressed distally, with cusps similar in shape and perfectly aligned along distal margin; ventral margin of toothed portion of maxillary curved towards ventral margin of premaxilla and maxillary teeth forming a continuous series with premaxillary teeth; margins of pre- and postzygapophyses with projections anteriorly and posteriorly directed; accumulation of...

Fish metacommunity structure in Caño Maraca, an important nursery habitat in the Western Llanos of Venezuela

Palavras-chave: Freshwater fish; Species description; Chapada Diamantina; Northeastern Brazil.

Ano: 2004

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252004000200001

Winemiller,Kirk O.; Taphorn,Donald C.; Kelso-Winemiller,Leslie C.; López-Delgado,Edwin O.; Keppeler,Friedrich W.; Montaña,Carmen G..

ABSTRACT We investigated spatial and seasonal variation of fish assemblages of Caño Maraca, a creek in Venezuela’s Western Llanos, a region with strong wet-dry seasonality. Fishes were surveyed over a 19-year period at three sites along the longitudinal gradient: a headwater site with a narrow channel, a middle site with shallow channels traversing a seasonal wetland, and a lower site where the channel has higher banks. Assemblage composition and presence of species with juveniles and various life history strategies were compared during wet and dry seasons. Overall, fish species richness was lowest at the headwater site and highest at the downstream site. During the wet season, however, species richness is greatest at the middle site, a pattern associated...

Redescription of Hypostomus johnii, a senior synonym of Hypostomus eptingi (Siluriformes: Loricariidae), Northeastern Brazil

Palavras-chave: Dispersal; Fluvial gradient; Freshwater fish; Neotropics; Nestedness.

Ano: 2018

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252018000400217

Ramos,Telton Pedro Anselmo; Zawadzki,Claudio Henrique; Ramos,Robson Tamar da Costa; Britski,Heraldo Antônio.

ABSTRACT Hypostomus johnii (Steindachner) was described from the rio Parnaíba basin in the state of Piauí and the rio São Francisco basin in the state of Bahia. Despite the good quality of the original description of H. johnii, it does not currently allow its distinction from congeners. Thus, H. johnii is redescribed based on the analysis of the types and several recently collected specimens. Recent collecting efforts of the rios Parnaíba and São Francisco basins resulted in specimens only being found in the rio Parnaíba basin. This raises doubts about whether H. johnii occurs in the rio São Francisco basin. The species is distinguished from its congeners by having a high number of teeth on the premaxilla and dentary (between 60-115); small to...

Diet-morphology relationship in the stream-dwelling characid Deuterodon stigmaturus (Gomes, 1947) (Characiformes: Characidae) is partially conditioned by ontogenetic development

Palavras-chave: Armoured catfish; Freshwater fish; Hypostominae; Neotropical fish; Taxonomy.

Ano: 2017

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000200213

Dala-Corte,Renato Bolson; Silva,Eliane Regina da; Fialho,Clarice Bernhardt.

ABSTRACT We tested whether interindividual variations in diet composition within a population of Deuterodon stigmaturus can be explained by morphological differences between individuals, and whether diet-morphology relationships are dependent on the ontogenetic development. We analyzed diet of 75 specimens sampled in a coastal stream of Southern Brazil. Variation in stomach content was summarized with a Principal Coordinate Analysis (PCoA). The retained PCoA axes were tested as response to standard length (SL), and to values of intestine length (IL) and mouth length (ML) independent of body size, using linear mixed-effects models (LMM). The most consumed food items by D. stigmaturus were filamentous algae (41%), terrestrial plants (20.3%), detritus (12%),...

A new species of Anchoviella Fowler, 1911 (Clupeiformes: Engraulidae) from the Amazon basin, Brazil

Palavras-chave: Characin; Coastal drainage; Feeding; Freshwater fish; Intraspecific variation.

Ano: 2016

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252016000200209

Loeb,Marina V..

Anchoviella juruasanga is described from the drainages of rios Negro, Madeira, Tapajós, Trombetas, Tocantins, and Jari, in the Amazon basin, Brazil. The new species is distinguished from its congeners by having a short upper jaw, with its posterior tip extending between the verticals through anterior and posterior margins of the pupil (vs. posterior tip of upper jaw extending beyond the vertical through posterior margin of the pupil). Anchoviella juruasanga is also distinct from other strictly freshwater Amazonian species of the genus by the distance from tip of snout to posterior end of upper jaw between 8 and 11% in standard length (vs. 14% or more in A. alleni, A. carrikeri, A. guianensis, and A. jamesi). The anal-fin origin slightly posterior to or at...

New species of Pyrrhulina (Teleostei: Characiformes: Lebiasinidae) from the eastern Amazon, Pará, Brazil

Palavras-chave: Anchovies; Engraulinae; Freshwater fish; Systematics; Taxonomy.

Ano: 2012

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000100002

Vieira,Lorena S.; Netto-Ferreira,André L..

ABSTRACT A new species of Pyrrhulina is described based on 60 specimens from tributaries of the rio Amazonas: rio Anapu, rio Capim, rio Guamá and rio Xingu, and coastal drainages in the state of Pará, Brazil. The new species differs from all congeners by having the primary stripe (the horizontal stripe of dark pigmentation extending posteriorly from the snout) terminating at the distal edge of the opercle. In all other species of Pyrrhulina, the primary stripe is either restricted to the snout or continues beyond the head (i.e. at least the anteriormost four scales of the lateral line series).

Development of microsatellite loci and population genetics of the catfish Pimelodus yuma (Siluriformes: Pimelodidae)

Palavras-chave: Color pattern; Freshwater fish; Pyrrhulininae; Taxonomy; Teleostei.

Ano: 2019

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252019000200215

Joya,Cristhian Danilo; Landínez-García,Ricardo Marcel; Márquez,Edna Judith.

ABSTRACT Pimelodus yuma (formerly Pimelodus blochii) is a freshwater fish, endemic to the Colombian Magdalena-Cauca and Caribbean basins that experiences habitat disturbances resulting from anthropogenic activities. Due to the lack of information about the population genetics of this species, this study developed 14 species-specific microsatellite loci to assess the genetic diversity and population structure of samples from the lower section of the Cauca River. The studied species showed genetic diversity levels higher than the average values reported for Neotropical Siluriformes and significant inbreeding levels as was described for some congeners. Furthermore, P. yuma comprises two coexisting genetic groups that exhibit gene flow along the lower section...

Recent trends in research on Lake Victoria fisheries. Proceedings of the Second EEC Regional Seminar on Recent Trends of Research on Lake Victoria Fisheries, organized and hosted by Kenya Marine and Fisheries Research Institute (KMFRI), 25-27 September 1991, Kisumu, Kenya

Palavras-chave: Freshwater fish; Genetic diversity; Gene flow; Molecular marker; Next generation sequencing.

Ano: 2021

URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252021000100209

Conseil Présidentil sur la Pêche

Okemwa, E.; Wakwabi, E.; Getabu, A..

Topics on Lake Victoria limnology, benthic fauna, stock assessment, catch assessment survey, gear selectivity, fisheries ecology, fish parasites and marketing economics are covered. Management and conservation of the lake's fisheries and other aquatic resources are discussed. Dialogue between fishermen, scientists and administrators is stressed, measures to be undertaken are addressed and further research is recommended.

Tipo: Proceedings Paper

Palavras-chave: Fishery management; Freshwater fish; Inland fisheries; Lake fisheries; Limnology; Resource management; Stock assessment; Zoobenthos; Fishery management; Lake fisheries; Limnology; Stock assessment; Inland fisheries; Resource management; Zoobenthos; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_4159; Http://aims.fao.org/aos/agrovoc/c_4343; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_3873; Http://aims.fao.org/aos/agrovoc/c_6524; Http://aims.fao.org/aos/agrovoc/c_15487.

Ano: 1994

URL: http://hdl.handle.net/1834/2125

Different property rights regimes in the Lake Victoria multiple species fishery

Tipo: Book

Ano: 2008

URL: http://hdl.handle.net/1834/2892

Caractérisation et variation phénotypique et biologique des deux sexes du sandre "Sander lucioperca" (l., 1758) (teleosteen, percidae) dans la retenue de barrage de Nebhana (Tunisie Centrale).

Brown, G.; Berger, B.; Ikiara, M..

Greater ecosystem complexity is recognized by studying a two species predator-prey model under two property rights regimes: free entry and a system such as individual quotas which execute an economically optimal solution. A bottom-up management experiment is discussed in the context of Lake Victoria fisheries.

Tipo: Report

Palavras-chave: Freshwater fish; Predators; Resource management; Predators; Resource management; Fisheries.

Ano: 2004

URL: http://hdl.handle.net/1834/1273

Distribution of economic benefits from the fisheries of Lake Victoria

Turki, O.; M'Hetli, M.; Chriki, A.; Kraiem, M.M..

Dans le but de caractériser phénotypiquement et biologiquement la population de sandre (Sander lucioperca (L, 1758)), et de détecter une éventuelle variabilité entre les sexes, une étude des variables méristiques et morphométriques ainsi que la croissance, a concerné 133 mâles et 166 femelles issus de la retenue de barrage de Nebhana. Le choix des variables méristiques et morphométriques a été décelé à partir de travaux bibliographiques montrant un taux important de variabilité chez les poissons marins et d'eau douce. Ainsi 9 caractères méristiques et 23 variables morphométriques ont été retenus. Les résultats ont montré une invariance des caractères méristiques entre les mâles et les femelles. Quant aux rapports morphométriques, les mâles diffèrent des...

Tipo: Journal Contribution

Palavras-chave: Animal morphology; Biological data; Cell differentiation; Comparative studies; Freshwater fish; Growth; Meristic counts; Morphometry; Phenotypes; Phenotypic variations; Population structure; Water reservoirs; Sex; Sex characters; Marine fisheries; Pike perch.

Ano: 2009

URL: http://hdl.handle.net/1834/4748

Biodiversity and sustainable management of a tropical wetland lake ecosystem: A case study of Lake Kanyaboli, Kenya

Abila, R.O.; Odongkara, K.O.; Onyango, P.O..

The Lake Victoria fishery contributes immensely to the socio-economic development of the riparian states. The East African Community has designated the lake basin as an ‘economic growth zone’, with the potential to develop into a major economic region. The fisheries are vital in creating employment opportunities, mostly rural-based, thereby helping to reduce rural-urban migration. Fish is also a rich source of animal protein for human consumption and provides raw material (fishmeal) for processing animal feeds. The fish industry contributes to GDP and has continued to be an important source of foreign exchange earned from fish exports. Besides, the fish industry contributes to the national and local government revenues through levying of various taxes,...

Tipo: Proceedings Paper

Ano: 2006

URL: http://hdl.handle.net/1834/2128

Different property rights regimes in the Lake Victoria multiple species fishery

Rasowo, J.O.; Abila, R.; Manyala, J..

Lake Kanyaboli and the surrounding Yala swamp wetland has been recognized as an important biodiversity hotspot. Recent population genetic and phylogenetic studies confirm the evolutionary importance of Lake Kanyaboli (Kenya) in preserving the cichlid fish fauna of Lake Victoria. The adjoining Yala swamp harbours the endangered swamp antelope Sitatunga (Tragecephalus spekii) and several papyrus endemic birds. The lake and adjoining swamp play a critical role in the livelihood of the local communities who heavily depend on the wetland resources. Current ongoing large scale land use changes within the swamp threaten the ecological integrity and functioning of this highly dynamic wetland ecosystem. It is therefore imperative that proper management and...

Tipo: Proceedings Paper

Palavras-chave: Wetlands; Biodiversity; Resource conservation; Inland waters; Ecosystem management; Ecological crisis; Tropical environment; Population genetics; Phylogenetics; Lake fisheries; Freshwater fish; Aquatic birds; Land use.

Ano: 2006

URL: http://hdl.handle.net/1834/2126

Highlights of 1960-1990 : Achievements in the last 30 years by the Nigerian institute for oceanography and marine research and its parent research division of the federal departement of fisheries, Lagos

Berger, B.; Brown, G.; Ikiara, M..

Tipo: Report

Palavras-chave: Freshwater fish; Predators; Resource management; Predators; Resource management; Http://aims.fao.org/aos/agrovoc/c_6163; Http://aims.fao.org/aos/agrovoc/c_6524.

Ano: 2004

URL: http://hdl.handle.net/1834/1273

Dynamique de la population de Sandre Stizostedion Lucioperca

Ajayi, T.O..

Before the Nigerian Institute for Oceanography and Marine Research was established in 1975, the Research division of the parent body carried out extensive resources surveys of the inshore waters (0-50m depth), identified and documented most of the Nigerian Marine and brackish water fish and shrimp resources. The promulgation of the Sea Fisheries Decree of 1971 was based on the research findings of the division which also initiated the biological study of the commercially important fishes. The research efforts of the division provided the first ever scientific information on the coastal oceanography of Nigeria. The possibility of a viable brackish water polyculture was also established at Buguma and Lagos....

Tipo: Report

Palavras-chave: Inshore waters; Freshwater fish; Shrimp fisheries; Coastal oceanography; Historical account.

Ano: 1991

URL: http://hdl.handle.net/1834/1185

Essai d’acclimatation du tilapia du Nil <Oreochromis niloticus> dans la retenue du barrage Lebna (Cap Bon, Tunisie)

Toujani, R.; Kraiem, M.M..

L’étude de la dynamique de population du sandre Stizostedion lucioperca dans la retenue du barrage de Sidi Salem (nord de la Tunisie) a été réalisée durant deux saisons : avril 1996 - mars 1998 . Elle a porté sur un échantillon de 1325 individus capturés par les pêcheurs professionnels. Cette étude a montré que: - La taille moyenne individuelle des sandres captures est inférieure à 30 cm pour une proportion supérieure à 75 % . - La taille de recrutement dans la pêcherie estimée à 18 cm est très inférieure à la taille de première maturité sexuelle de l’ espèce qui est de 24 cm. - La taille et la masse individuelles moyennes des sandres capturés se sont améliorées durant la saison 1997 par rapport à celle de 1996. - Le taux de mortalité par pêche des groupes...

Tipo: Journal Contribution

Palavras-chave: Taille; Mortalité; Length-weight relationships; Recrutement; Masse; Recruitment; Stizostedion lucioperca; Mortality; Freshwater fish; Population dynamics; Pike perch; Http://aims.fao.org/aos/agrovoc/c_5877.

Ano: 2002

URL: http://hdl.handle.net/1834/221

Cycle sexuel des femelles de sandre Stizostedion lucioperca (L.,1758) Pisces, Percidae) dans la retenue du barrage de Sidi Salem (Tunisie)

Derouiche, E.; Azaza, M.S; Kraiem, M. M..

Ce travail consiste à tester l’acclimatation d’une espèce thermophile, le tilapia du Nil Oreochromis niloticus dans la retenue du barrage Lebna (Cap Bon), moyennant un système extensif de grossissement. Les résultats montrent que le tilapia introduit directement en pleine retenue a pu se maintenir et supporter les mauvaises conditions hivernales en adoptant une stratégie d’hibernation. Par ailleurs, avec le retour des conditions favorables (T>20°C), ce Cichlidé a montré une bonne condition, une meilleure croissance qu’en élevage dans les bassins et cette fraction de population a pu proliférer.

Tipo: Journal Contribution

Palavras-chave: Freshwater fish.

Ano: 2009

URL: http://hdl.handle.net/1834/3704