インデックス付き
- 環境研究へのオンライン アクセス (OARE)
- Jゲートを開く
- Genamics JournalSeek
- ジャーナル目次
- シマゴ
- ウルリッヒの定期刊行物ディレクトリ
- Global Online Research in Agriculture (AGORA) へのアクセス
- 電子ジャーナルライブラリ
- 国際農業生物科学センター (CABI)
- レフシーク
- 研究ジャーナル索引作成ディレクトリ (DRJI)
- ハムダード大学
- エブスコ アリゾナ州
- OCLC-WorldCat
- 学者の舵取り
- SWBオンラインカタログ
- 仮想生物学図書館 (vifabio)
- パブロン
- ミアル
- 大学補助金委員会
- ユーロパブ
- Google スカラー
このページをシェアする
ジャーナルチラシ
概要
Elasmobranch Distribution and Assemblages in the Southern Tyrrhenian Sea (Central Mediterranean)
Bottari T,Busalacchi B,Profeta A,Mancuso M*,Giordano D,Rinelli P
The aim of this study is to identify elasmobranch species present in the SouthernTyrrhenian Sea, to describe
their distribution and abundance, to identify significant spatial or temporal differences between species. 14 bottom trawl surveys were carried out from 1994 to 2007. 16 species of elasmobranchs were recorded. Multidimentional Scaling Ordination (MDS) showed two groups according to the depth gradient: in the first one the stations from upper slope and in the second one the stations from middle slope. Mean biomass indices and frequency of occurrence showed that Galeus melastomus, Etmopterus spinax and Scyliorhinus canicula were the most abundant species. Mean biomass indices for other species were very low. The mean abundance of G. melastomus exhibited a positive temporal trend in biomass and density. The mean abundance of E. spinax exhibited a negative temporal trend in biomass and in density. For other species abundance varied greatly between years, even if there was no evident trend.