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Assessment of indicator trends related to exploited demersal fish populations and communities in the Mediterranean ArchiMer
MEDITS.
Since 1994, Mediterranean research organisations have carried out yearly standardized bottom trawl surveys along the coasts of the Mediterranean Sea from Gibraltar to the Aegean Sea (Medits surveys). A dynamic indicator-based approach to the assessment of multi-stock fisheries has been applied to the data series obtained from these surveys by an international working group involving all the scientific teams contributing to the data collection process. The application was done according to the 13 GFCM geographical sub-areas sampled by the Medits surveys. While reference points for a lot of fished populations and community indicators are seldom available, reference directions are well established for some indicators, giving guidelines for fishery management....
Tipo: Text Palavras-chave: Mediterranean; Bottom trawl survey; Community; Fish population; Indicator.
Ano: 2007 URL: https://archimer.ifremer.fr/doc/2007/rapport-2198.pdf
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Longitudinal habitat disruption in Neotropical streams: fish assemblages under the influence of culverts Neotropical Ichthyology
Mariano,José Roberto; Makrakis,Maristela Cavicchioli; Kashiwaqui,Elaine Antoniassi Luiz; Celestino,Elaine Fernandes; Makrakis,Sergio.
This study assessed differences in fish assemblages existing upstream and downstream two types of culverts, one on each of two different Neotropical streams. We analyzed the composition and structure of the ichthyofauna and tested for spatial patterns. Fish sampling was carried out monthly between November 2009 and October 2010 using different fishing gears. We collected 2,220 fish of 33 species; 901 in stretches of the Lopeí stream - circular culvert and 1,310 in stretches of the Pindorama stream - box culvert. Fish abundance was similar in upstream and downstream stretches of the circular culvert, whereas it was slightly higher in the upstream than downstream stretch for the box culvert. Characiformes predominated in the upstream stretch of both...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fish passage; Fish population; Habitat fragmentation; Road crossings.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000400010
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