Consulta: subjectFacets:"Natural diet"
Registros recuperados: 8
Data/hora: 07/06/2024 09:37:00

Phytoplankton composition and selective feeding of the pearl oyster Pinctada margaritifera in the Takapoto lagoon (Tuamotu Archipelago, French Polynesia): in situ study using optical microscopy and HPLC pigment analysis
Provedor de dados: 5
Autores: Loret, P; Pastoureaud, Annie; Bacher, Cedric; Delesalle, B.
The in situ diet of the pearl oyster Pinctada margarifera was determined in the lagoon of Takapoto Atoll by comparing the phytoplankton composition of water and bivalve gut contents using 2 different methods, optical microscopy and HPLC pigment analysis. In order to evaluate the available food resources for pearl oysters in the water column, a new method for estimating the pigment/chlorophyll a (chl a) ratio (based on an inverse analysis) was developed which allowed us to determine the contribution of the main phytoplanktonic groups in terms of chi a. In the water, picocyanobacteria and nanoflagellates predominated, the latter being mainly chlorophytes and prymnesiophytes. Comparisons between the results obtained by the 2 methods of investigation indicated...
Tipo: Text
Palavras-chave: Pearl oyster Pinctada margaritifera; Selective feeding; Natural diet; Phytoplankton pigments; Coral reefs; French Polynesia.
Ano: 2000
URL: http://archimer.ifremer.fr/doc/00000/10992/7606.pdf

Assessing diet composition of seahorses in the wild using a non destructive method: Hippocampus reidi (Teleostei: Syngnathidae) as a study-case
Provedor de dados: 83
Autores: Castro,André Luiz da Costa; Diniz,Aline de Farias; Martins,Ieda Zaparolli; Vendel,Ana Lúcia; Oliveira,Tacyana Pereira Ribeiro de; Rosa,Ierecê Maria de Lucena.
This paper presents the results of the first analysis of the natural diet of Hippocampus reidi, one of the most sought after seahorse species in the international aquarium trade. Its main goals were to investigate food items and prey categories consumed by the species, and to discuss feeding strategy and inter and intra-individual components of niche breadth. Data were gathered from October 2005 to September 2006 at the Mamanguape estuary, State of Paraíba, NE Brazil. Food items from seahorses anaesthetized with clove oil were obtained by using a modified version of the flushing method, and were counted and identified to the lowest possible taxonomic level. Specimens were marked and had their height, sex, life and reproductive stage recorded, and then...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Natural diet; Husbandry; Conservation.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252008000400012

Natural diet of Ocypode quadrata (Fabricius, 1787) (Crustacea, Decapoda, Brachyura) from the Northern Coast of São Paulo, Brazil
Provedor de dados: 84
Autores: Gomes,Tassia Turini; Gheler-Costa,Carla; Rinaldi,Caroline Anacleto; Santana,William.
Abstract Decapod crustaceans have a wide variety of feeding habits, alternating among herbivory, predation, saprophagy, and filtration. The occupation of various trophic positions in the food web is a key feature in the evolution of the group. Thus, we analyzed the natural diet of the crab Ocypode quadrata (Fabricius, 1787), commonly known as the ghost crab and typically found on sandy beaches. The crabs were collected in the region of Ubatuba, between July 2016 and May 2017. The individuals were dissected in the laboratory, and each stomach was weighed and visually assessed in relation to the degree of repletion. After identification and classification, the items found were grouped for the analysis. In analyzing the stomach contents of Ocypode quadrata,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ghost crab; Natural diet; Ocypodidae; Seasonality; Trophic ecology.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0031-10492019000100257

Feeding and nutritional ecology of the edible sea urchin Loxechinus albus in the northern Chilean coast
Provedor de dados: 97
Autores: GONZÁLEZ,SOLANGE J; CÁCERES,CRISTIAN W; OJEDA,F. PATRICIO.
The red sea urchin Loxechinus albus, an economically important species oceurring along the Chilean littoral benthic systems, has been heavily exploited by artisanal fisheries in recent decades. However, basic knowledge of its trophic biology is still scarce. Studies of this kind are critical to the successful development of farming techniques as an alternative to the harvest of natural populations. The aims of this study were to quantify the composition of L. albus' natural diet, to determine the assimilation efficieney of the most important dietary components, and to experimentally examine the species' trophic selectivity. Adult and juvenile specimens were sampled in spring 1993 and summer, fall and winter 1994 from the shallow subtidal zone of Iquique,...
Tipo: Journal article
Palavras-chave: Assimilation efficieney; Loxechinus; Natural diet; Trophic selectivity.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2008000400010

Alimentação natural do camarão sete-barbas, Xiphopenaeus kroyeri (Heller) (Crustacea, Decapoda), na Armação do Itapocoroy, Penha, Santa Catarina
Provedor de dados: 104
Autores: Branco,Joaquim Olinto; Moritz Júnior,Heder Cassiano.
The feeding of X. kroyeri (Heller, 1862) was analyzed during the period from August/98 to July/99 using the frequency of occurrence, frequency of points and feeding index methods. The species presents a broad trophic specter and diversified, composed by 30 items: Gammaridae, organic matter, Acetes americanus, Polychaeta, Globigerina and Osteichthyes were the most explored items.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Decapoda; Xiphopenaeus kroyeri; Feeding habits; Natural diet.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752001000100004

Ecologia trófica de Portunus spinimanus Latreille (Decapoda, Portunidae) na Armação do Itapocoroy, Penha, Santa Catarina, Brasil
Provedor de dados: 104
Autores: Branco,Joaquim Olinto; Lunardon-Branco,Maria José.
The feeding of P. spinunanus Latreille, 1819 was analyzed from January to December 1995 using the frequency of occurrence, frequency of points and feeding index methods. The species presents a broad trophic specter and diversified, composed by 24 items. The trophic analyses indicated the species show that the categories Crustacea, Osteichthyes, Echinodennata and Mollusca were the rnostexploited resources.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Decapoda; Portunidae; Portunus spinimanus; Trophic ecology; Natural diet.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752002000300009

The diet of Scinax angrensis (Lutz) tadpoles in an area of the Atlantic Forest (Mangaratiba, Rio de Janeiro) (Amphibia, Anura, Hylidae)
Provedor de dados: 104
Autores: Sousa Filho,Izidro F. de; Branco,Christina C.; Carvalho-e-Silva,Ana M. P. Telles de; Silva,Guilherme R. da; Sabagh,Leandro T.
Scinax angrensis (Lutz, 1973) is an endemic species, which occurs in low altitude hillside forests, distributed from the municipalities of Mangaratiba to Parati in the south of the state of Rio de Janeiro, Brazil. The aim of this study was to compare the morphology of S. angrensis tadpoles in two different stages of development, and verify their feeding spectrum. The mouth morphology of the two stages studied (27 and 37) appeared similar, with a difference in the size of the oral opening as well as an increase in the dimensions of the body. The examined species presented a trophic spectrum comprised of algae, protozoan, rotifers, microcrustaceans, nematodes, vegetation and invertebrate remains, fungus hyphae, and sand grains. Significant differences were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amphibian; Natural diet.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752007000400012

Natural Diet of Callinectes ornatus Ordway, 1863 (Decapoda, Portunidae) in the Itapocoroy Inlet, Penha, SC, Brazil
Provedor de dados: 52
Autores: Branco,Joaquim Olinto; Lunardon-Branco,Maria José; Verani,José Roberto; Schveitzer,Rodrigo; Souto,Flávio Xavier; Vale,William Guimarães.
From January to December 1995, 332 individuals of the Callinectes ornatus species were collected from the Itapocoroy inlet in Penha, Sta. Catarina, Brazil to study its natural diet and the seasonal variations of diet. Results showed a diversified trophic spectrum with a generalized dietary strategy comprising the algae, macrophyta, foraminiferida, mollusca, polychaeta, crustacea, echinodermata, Osteichthyes and NIOM (Nonidentified Organic Matter) groups.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: C. ornatus; Portunidae; Natural diet; Dietary habits; Dietary ecology.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132002000100006