Data/hora: 06/06/2024 09:45:31

Provedor de dados: | 103
País: | Brazil
Título: | A protocol for measuring spatial variables in soft-sediment tide pools
Autores: | Brenha-Nunes,Marina R.; Contente,Riguel F.; Rossi-Wongtschowski,Carmen L.D.B.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Beach-seine; Capture efficiency; Crypto-benthic species; Tidal flat.
Resumo: | ABSTRACT We present a protocol for measuring spatial variables in large (&gt;50 m2) soft-sediment tide pool. Secondarily, we present the fish capture efficiency of a sampling protocol that based on such spatial variables to calculate relative abundances. The area of the pool is estimated by summing areas of basic geometric forms; the depth, by taken representative measurements of the depth variability of each pool's sector, previously determined according to its perimeter; and the volume, by considering the pool as a prism. These procedures were a trade-off between the acquisition of reliable estimates and the minimization of both the cost of operating and the time spent in field. The fish sampling protocol is based on two con secutive stages: 1) two people search for fishes under structures (e.g., rocks and litters) on the pool and capture them with hand seines; 2) these structures are removed and then a beach-seine is hauled over the whole pool. Our method is cheaper than others and fast to operate considering the time in low tides. The method to sample fish is quite efficient resulting in a capture efficiency of 89%.
Tipo: | Info:eu-repo/semantics/other
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-46702016000204000
Editor: | Sociedade Brasileira de Zoologia
Relação: | 10.1590/S1984-4689zool-20150165
Formato: | text/html
Fonte: | Zoologia (Curitiba)  v.33 n.2 2016
Fonte: | info:eu-repo/semantics/openAccess