Consulta: subjectFacets:"Adaptations"
Registros recuperados: 11
Data/hora: 11/06/2024 05:23:50

Structures adaptatives a la filtration des aliments chez le crabe des sables, Scopimera gordonae
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Bauchau, A.
In the sand crab, Scopimera gordonae the buccal appendages are adapted to an efficient mobilization and washing of the sand in order to collect the nutritive elements. These observations confirm the role of Scopimera gordonae in the recycling of the organic material associated with the sand particles.
Tipo: Text
Palavras-chave: Malacostraca; Adaptations; Functional morphology; Mouth parts; Ecophysiology.
Ano: 1987
URL: http://archimer.ifremer.fr/doc/1987/acte-1389.pdf

Adaptive features of a bacteriolytic enzyme from the style of the mussel Choromytilus meridionalis in response to environmental fluctuations.
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Seiderer, L; Robb, F.
The extracellular digestive apparatus of bivalve molluscs consists of a crystalline style containing diverse degradative enzymes which are released during rotation and dissolution of the style. This paper reviews the occurrence of a temperature-regulated bacteriolytic enzyme in the black mussel Choromytilus meridionalis , which is an inhabitant of coastal reefs on the south and south west coast of South Africa. This agent is unable to lyse Micrococcus luteus or Escherichia coli , both of which are susceptible to lysis by a true lysozyme. It appears to have a restricted spectrum of activity which includes both free-living and kelp-associated gram-negative bacteria. In addition, the level of activity varies dramatically according to the environmental water...
Tipo: Text
Palavras-chave: Choromytilus meridionalis; Bivalvia; Digestive system; Bacteria; Upwelling; Environmental effects; Adaptations; Bacteriocides; Marine molluscs; Enzymatic activity.
Ano: 1984
URL: http://archimer.ifremer.fr/doc/1984/acte-991.pdf

Préparation des outils de formation et de sensibilisation sur la problématique des changements climatiques et les méthodes d’adaptation, les techniques de régénération et de gestion durable des écosystèmes de mangroves
Provedor de dados: Ocean Docs: e-repository of  publications
Le changement climatique et ses conséquences sur l’environnement affecteront bien entendu tous les aspects de notre vie : l’approvisionnement en eau et en nourriture, la répartition et les zones d’influence de certaines maladies, ainsi que nos modes de production et de consommation. L’Afrique est l’un des continents extrêmement vulnérable aux changements climatiques. Sur le plan biophysique, le Cameroun est caractérisé par une grande variabilité, qu’il s’agisse du climat, des écosystèmes ou de la diversité biologique. D’autre part, les mangroves qui constituent des écosystèmes particuliers et reconnus d’importance internationale sont très fragiles et sensibles aux impacts des changements climatiques et aussi sont exploitées de manière non durable par les...
Tipo: Report
Palavras-chave: Mangroves; Adaptations; Coastal environment.
Ano: 2012
URL: http://hdl.handle.net/1834/5229

Evaluación del estado de explotación de la merluza de cola Macruronus magellanicus en la plataforma sur-argentina.
Provedor de dados: Ocean Docs: e-repository of  publications
Autores: Prenski, L.B.; Ehrhardt, N.M.; Legault, C.
Hoki, Macruronus magellanicus, is an important resource in the Argentinean multispecific southern demersal fishery. The species is distributed South of 46°S between the 50 and 200 meter isobaths. Thesouthern demersal fishery was almost nil prior to 1987, becoming more relevant toward the end of the 1980's. International fleets operating through several fishery agreement were those of the ex-Soviet Union,Bulgaria and Japan. Research on the abundance of hoki resources were initiated in the early 1970's; however, fishery research have been noticeably enhanced since 1992. In this study existing information on the Argentinean hoki fishery is integrated and an assessment of the status of exploitation of the species is carried out.As a result of the analyses, a...
Tipo: Journal Contribution
Palavras-chave: Fishery management; Mortality; Abundance; Stock assessment; Gadoid fisheries; Demersal fisheries; Adaptations; Fishery management; Stock assessment; Demersal fisheries; Mortality; Http://aims.fao.org/aos/agrovoc/c_24026; Http://aims.fao.org/aos/agrovoc/c_24251; Http://aims.fao.org/aos/agrovoc/c_2173; Http://aims.fao.org/aos/agrovoc/c_4945.
Ano: 1997
URL: http://hdl.handle.net/1834/1924

The effect of &lt;i&gt;Artemia&lt;/i&gt; -supplementation of dry foods on growth and survival of &lt;i&gt;Clarias gariepinus&lt;/i&gt; (Burchell 1822) larvae
Provedor de dados: Open Marine Archive
Autores: Van Damme, P.; Pacolet, W.; Sulem Yong, S.; Fremaut, D.; Ollevier, F.P.
Two experiments were performed in order to determine the effect of supplementation of dry foods with live &lt;i&gt;Artemia&lt;/i&gt; nauplii on the growth, survival, rate of cannibalism, and length-weight relationships of &lt;i&gt;Clarias gariepinus&lt;/i&gt; larvae. It was found that &lt;i&gt;Artemia&lt;/i&gt; -supplementation resulted in a significantly higher growth rate. The "condition", expressed as a length-weight relationship, was likewise altered after supplementation. The survival and rate of cannibalism were not influenced by supplementation. &lt;i&gt;Artemia&lt;/i&gt; -supplementation of dry foods was compared with other approaches which are based on the concept of the 'adaptation weight'.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptations; Freshwater fish; Weight; Artemia; Clarias gariepinus.
Ano: 1989
URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3193

Policy Reform in the Tobacco Industry:  Producers Adapt to a Changing Market
Provedor de dados: Research in Agricultural & Applied Economics (AgEcon Searh)
Autores: Foreman,   Linda F.; McBride,   William D.
The Fair and Equitable Tobacco Reform Act of 2004 eliminated tobacco quotas and tobacco price supports and allowed producers to plant any amount or type of tobacco regardless of geographic location. The authors found that flue-cured tobacco producers made greater adjustments  to their operations after the buyout than did burley tobacco producers. Flue-cured tobacco producers were more likely to increase tobacco acres per farm, pushing up the tobacco acreage per farm at a faster rate compared with burley tobacco producers. Flue-cured producers also were more likely to invest in their tobacco enterprises and invested more per farm after 2004. As a result of increased acreage, tobacco  operations became more sensitive to changes in labor costs. With over 75...
Tipo: Report
Palavras-chave: Tobacco; Structural change; Farm adjustments; Adaptations; Agricultural Resources Management Survey (ARMS) Acknowledgments; Agricultural and Food Policy; Crop Production/Industries; Farm Management.
Ano: 2011
URL: http://purl.umn.edu/117969

Use of anatomical root markers for species identification in Catasetum (Orchidaceae) at the Portal da Amazônia region, MT, Brazil
Provedor de dados: Acta Amazonica
Autores: SILVA,Ivone Vieira da; OLIVEIRA,Rubens Maia de; ROSSI,Ana Aparecida Bandini; SILVA,Angelita Benevenuti da; OLIVEIRA,Daiane Maia de.
Orchidaceae is one of the largest botanical families, with approximately 780 genera. Among the genera of this family, Catasetum currently comprises 166 species. The aim of this study was to characterize the root anatomy of eight Catasetum species, verifying adaptations related to epiphytic habit and looking for features that could contribute to the vegetative identification of such species. The species studied were collected at the Portal da Amazônia region, Mato Grosso state, Brazil. The roots were fixed in FAA 50, cut freehand, and stained with astra blue/fuchsin. Illustrations were obtained with a digital camera mounted on a photomicroscope. The roots of examined species shared most of the anatomical characteristics observed in other species of the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptations; Catasetinae; Epiphyte; Velamen.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000100021

Leaf anatomy of Qualea parviflora (Vochysiaceae) in three phytophysiognomies of the Mato Grosso State, Brazil
Provedor de dados: Acta Amazonica
Autores: ARIANO,Ana Paula Ramos; SILVA,Ivone Vieira da.
ABSTRACT Leaves have a variety of morphological and anatomical characters mainly influenced by climatic, edaphic and biotic factors. The aim of this study was to describe the anatomical leaf traits of Qualea parviflora from three phytophysiognomies. The studied phytophysiognomies were Amazon Savannah on rocky outcrops (ASR), Transition Rupestrian Cerrado (TRC), and Cerradão (CDA). Freehand sections of the leaf blade were made and stained with 0.5% astra blue and with basic fuchsin. From the adaxial and abaxial leaf surface, freehand paradermal sections were made for epidermis analysis. The Jeffrey´s method, with modifications, was used in the epidermis dissociation process. The samples from the TRC phytophysiognomy had relatively smaller ordinary epidermal...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Adaptations; Amazon; Cerrado; Environmental conditions.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000200119

Fishes of the Amazon: diversity and beyond
Provedor de dados: Anais da Academia Brasileira de Ciências
Autores: VAL,ADALBERTO LUIS.
Abstract: The Amazon basin houses a particular group of freshwater organisms, whose study tells the geological history of the region, how biological diversity was shaped, how it is maintained, and what it hides. The fish of the Amazon is represented by more than 3,000 known species distributed from the basal groups up to the more specialized ones. This species richness hides a diversity of adaptations that are dispersed at all levels of the biological organization. In this summary of the conference delivered at the Brazil-France Bilateral Symposium, held in Manaus in 2018, we describe two aspects of the hidden world of adaptive diversity: adaptations to changes in dissolved oxygen and the abilities of the Rio Negro fish to face acidic and ion-poor waters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amazonia; Biodiversity; Adaptations; Hypoxia; Dissolved organic carbon; Climate changes.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000600602

Hemoglobin affinity for oxygen in three subspecies of toads (Bufo sp.) living at different altitudes
Provedor de dados: Biological Research
Autores: OSTOJIC,HRVOJ; MONGE-C,CARLOS; CIFUENTES,VERONICA.
Blood oxygen affinity and red blood cell properties were measured in three subspecies of genus Bufo: Bufo spinulosus limensis, collected at sea level and at an average day temperature of 20ºC; Bufo spinulosus trifolium, from 3100 m, average day temperature of 15ºC; and Bufo spinulosus flavolineatus, from 4100 m, average day temperature of 10ºC. Electrophoresis of the hemoglobin showed the same component in each of the three subspecies. At 20ºC the blood oxygen affinities (P50) showed small differences between Bufo spinulosus limensis and Bufo spinulosus trifolium, whereas the value for Bufo spinulosus flavolineatus was markedly lower. At 10ºC, the ambient temperature of Bufo spinulosus flavolineatus, the P50 was extremely low compared with the other two...
Tipo: Journal article
Palavras-chave: Adaptations; Altitude; Amphibians; Bufo spinulosus limensis; Bufo spinulosus trifolium; Bufo spinulosus flavolineatus; Hemoglobin affinity; Hematocrits; Oxygen binding; Toads.
Ano: 2000
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602000000100007

Comparative anatomy of the absorption roots of terrestrial and epiphytic orchids
Provedor de dados: Brazilian Archives of Biology and Technology
Autores: Moreira,Ana Sílvia Franco Pinheiro; Isaias,Rosy Mary dos Santos.
The present study compared roots of terrestrial and epiphytic Orchidaceae, analyzing the anatomical characteristics from an ecological point of view. The material was collected at three different sites in Minas Gerais / Brazil and was fixed in FAA. Transverse sections were obtained by freehand sections or from material previously embedded in Paraplast® or Historesin®. The prominent characteristics of the epiphytic group were: significant smaller perimeter, epidermis with 3 or more cell layers, U-thickened exodermal cell walls, O-thickened endodermal cell walls, and a low ratio between the caliber and the number of protoxylem arches. The terrestrial group presented simple or multiseriate epidermis, and exodermis and endodermis with typical Casparian strips....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Orchids; Terrestrial; Epiphytic; Anatomy; Adaptations.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000100011