Results 141 to 150 of about 97,915 (261)

Peix ecològic o peix sostenible? Anàlisis d'una paradoxa del sector pesquer

open access: yes, 2020
Inicialment, s'analitza el sector de l'aqüicultura i la pesca, a partir de la recopilació de les normatives europees vigents i els estàndards de certificació sostenible d'organismes privats, fent un repàs general sobre la problemàtica actual d'ambdues activitats i plantejant alternatives més sostenibles ambientalment. L'objectiu del projecte consisteix
openaire   +1 more source

Temporary fat storage, an adaptation of some fish species to the waterlevel fluctuations and related environmental changes of the Amazon river

open access: yes, 1985
Analysis of Amazonian freshwater fish exhibited great differences in water- and fat content. Migratory species which deposit huge amounts of eggs in a single spawning act accumulate at high water-level great amounts of fat in various parts of the body ...
Junk, W.
core  

PEIXES CARTILAGINOSOS DA COSTA BRASILEIRA

open access: yes
Cartilaginous fishes (class Chondrichthyes) comprise a monophyletic group composed of sharks, batoids and chimaeras. They have a calcified cartilaginous skeleton and are one of the oldest and most diverse living vertebrate groups with a successful evolutionary history. The cartilaginous fishes possess sensory systems that play roles in the detection of
Medeiros, Andrielli Maryan   +5 more
openaire   +1 more source

Avaliação emergética do sistema de produção integrado de grãos, suínos e peixes em Santa Catarina: seus subsistemas e a intensificação da suínocultura. [PDF]

open access: yes, 2015
Nesta avaliação emergética calculou-se os indicadores de transformidade solar (Tr), renovabilidade (%R), relação do rendimento de emergia (EYR), índice de investimento de emergia (EIR), relação de carga ambiental (ELR) e a relação de troca de emergia ...
CAVALETT, O.   +2 more
core  

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