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Fish abundance and distribution patterns related to environmental factors in a choked temperate coastal lagoon (Argentina)
A utilizacao diferencial do habitat pelas especies that ocorrem na lagoa costeira Mar Chiquita foi observada, andando os ventos de direcao leste sopraram, a maior abundância foi registrada na zona of aguas mixo-eurihalinas.
Food habits of the broad nose skate, Bathyraja brachyurops (Chondrichthyes, Rajidae), in the south-west Atlantic
There were no differences between sexes and regions in the diet composition, but dietary shifts with ontogeny were found, and the Levins’ standardized index indicated wider niche breadth for small skates, whereas larger skate specimens showed a narrow niche breadth with a specialization in fishes.
Feeding habits of the Magellan skate: effects of sex, maturity stage, and body size on diet
Evaluating the effects of sex, maturity stage, and body size on the diet of the Magellan skate, Bathyraja magellanica, in the Southwest Atlantic off Argentina, by examining stomach contents using a multiple hypothesis modeling approach suggests that evaluating the importance of life-history stages on the feeding habits of a species is essential for understanding how that species exploits food resources.
Feeding habits of the Rio skate, Rioraja agassizi (Chondrichthyes: Rajidae), from off Uruguay and north Argentina
The feeding habits of the Rio skate, Rioraja agassizi, from off Uruguay and north Argentina were evaluated using a multiple-hypothesis modelling approach and revealed adapts its feeding habits in response to regional and seasonal changes.
Trophic ecology of the black drum, Pogonias cromis (Sciaenidae), in Mar Chiquita coastal lagoon (Argentina)
This is the first documentation on the feeding habits of the black drum, Pogonias cromis, in waters of South America and shows that this species is a benthic predator focusing on bivalves and crabs.
Feeding habits and habitat selectivity of the shortnose guitarfish, Zapteryx brevirostris (Chondrichthyes, Rhinobatidae), off north Argentina and Uruguay
The diet of Z. brevirostris can be influenced by the selectivity of this species for sandy bottoms, which increases the vulnerability of the species by exposing it to fishing mortality.
Comparative analysis of feeding habits and dietary niche breadth in skates: the importance of body size, snout length, and depth
It is found that skate species that forage on large prey have the largest body size and skate species with the smallest body size prey on small and medium-sized invertebrates have an effect on the diet of skates.
First record of a dicephalic specimen of tope Galeorhinus galeus (Elasmobranchii: Triakidae).
The first case of dicephalia in tope Galeorhinus galeus analysed in developing foetuses removed from a pregnant female caught off the Mar del Plata coastal waters, Argentine Sea, is reported here.
Feeding habits of a large endangered skate from the south-west Atlantic: the spotback skate, Atlantoraja castelnaui
It is found that prey size increased with predator's size using a multiple-hypothesis modelling approach between seasons and regions and that A. castelnaui preyed mainly on teleosts, followed by cephalopods, elasmobranchs and decapods.
Using opportunistic records from a recreational fishing magazine to assess population trends of sharks
Detecting and determining changes in the occurrence and abundance of species is a priority for effective management of resources and for conservation of biodiversity. In the absence of long-term