Crustaceans and fish abundances and species at and around artificially introduced tetrapod fields in the southern North Sea, 2009 ...

The micro-scale spatial distribution patterns of a demersal fish and decapod crustacean assemblage were assessed in a hard-bottom kelp environment in the southern North Sea. Using quadrats along line transects, we assessed the in situ fish and crustacean abundance in relation to substratum types (ro...

Full description

Bibliographic Details
Main Authors: Wehkamp, Stephanie, Fischer, Philipp
Format: Dataset
Language:English
Published: PANGAEA 2013
Subjects:
Online Access:https://dx.doi.org/10.1594/pangaea.821909
https://doi.pangaea.de/10.1594/PANGAEA.821909
Description
Summary:The micro-scale spatial distribution patterns of a demersal fish and decapod crustacean assemblage were assessed in a hard-bottom kelp environment in the southern North Sea. Using quadrats along line transects, we assessed the in situ fish and crustacean abundance in relation to substratum types (rock, cobbles and large pebbles) and the density of algae. Six fish and four crustacean species were abundant, with Ctenolabrus rupestris clearly dominating the fish community and Galathea squamifera dominating the crustacean community. Differences in the substratum types had an even stronger effect on the micro-scale distribution than the density of the dominating algae species. Kelp had a negative effect on the fish abundances, with significantly lower average densities in kelp beds compared with adjacent open areas. Averaged over all of the substrata, the most attractive substratum for the fish was large pebbles. In contrast, crustaceans did not show a specific substratum affinity. The results clearly indicate ... : Supplement to: Wehkamp, Stephanie; Fischer, Philipp (2013): Impact of hard-bottom substrata on the small-scale distribution of fish and decapods in shallow subtidal temperate waters. Helgoland Marine Research, 67(1), 59-72 ...