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Ecologia Trófica de Macroinvertebrados e Peixes Demersais na Armação do Itapocoroy, Penha, SC. (LUNARDON-BRANCO, 2000)
ABSTRACT
This study is part of a larger project that seeks to characterize biological
and ecologically Armação do Itapocoroy, in Penha (SC), Brazil. The
macroinvertebrate animals and demersal fish were captured using two over-
trawls nets with doors used by artesanal fishery with medium speed of 2
nautical miles. Three dragging of 30 minutes each were done between 5 and
10 meters. The 15 species distributed among macroinvertebrate animals and
demersal fish, were selected in relation to their abundance and occurrence
along the year. A total of 3154 stomach contents were analyzed by the
frequency of occurrence (FO) and the points (MP) method, complemented with
the alimentary index (IAi). Besides those methods, diversity H' and equitability
J' indexes were seasonally calculated for the alimentary categories. The
analyses indicated that the species Farfantepenaeus paulensis, Hepatus
pudibundus, Callinectes ornatus, Portunus spinimanus, Diplectrum radiale,
Diplectrum formosum, Stellifer brasiliensis and Etropus crossotus present
carcinofagous habit and Peracarida, Brachyura and Crustacea were the main
groups consumed. Dardanus insignis, Pomadasys corvinaeformis, Isopisthus
parvipinnis and Paralonchurus brasiliensis were carnivorous and
Echinodermata, Polychaeta, Osteichthyes and Crustacea were their selected
food. Luidia clathrata and Luidia senegalensis present malacofagous habit,
being Mollusca the main food. Synodus foetens was
piscivorous/malacofagous, preferring Osteichthyes and Mollusca. The cluster
analyses indicated 4 trophic groups: Group I: denominated predators of
Crustacea, mainly Peracarida and predators of Polychaeta. This group to be
establish by fishes: Paralonchurus brasiliensis, Pomadasys corvinaeformis,
Diplectrum radiale and Etropus crossotus. Group II: denominated predators of
Crustacea, mainly Mysidacea and Amphipoda, and predators of Osteichthyes.
This group to be establish by fishes: Isopisthus parvipinnis, Stellifer brasiliensis
and Diplectrum formosum. Group III: denominated predators of Crustacea,
mainly Brachyura and Peracarida, and predators of Ophiuroidea. This group to
be establish by crustaceans Portunus spinimanus, Callinectes ornatus,
Dardanus insignis, Hepatus pudibundus and Farfantepenaeus paulensis.
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