<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>Four Talitridae species have been recorded in the southern Baltic Sea, including two indigenous species – <italic>Talitrus saltator</italic>, <italic>Deshayesorchestia deshayesii</italic>, and two presumably non-indigenous ones – <italic>Cryptorchestia garbinii</italic>, <italic>Platorchestia platensis</italic>. It has been twelve years since <italic>Platorchestia platensis</italic> was recorded for the first time. The distribution and abundance of talitrids have not been studied since the 1990s. Therefore, the main objective of this research was to document the occurrence in Talitridae in the region in order to determine whether non-indigenous <italic>P. platensis</italic> has spread and whether it co-occurs with indigenous species. Talitrids were recorded at 20 out of 43 sampling sites. <italic>T. saltator</italic> occurred both along the coast of the open sea and in the Gulf of Gdańsk. The remaining species were found only around the gulf. <italic>P. platensis</italic> was more abundant than other species and its density was positively correlated with wrack biomass. Our studies have shown that the area of <italic>T. saltator</italic> occurrence has decreased during the last two decades. Non-indigenous species <italic>P. platensis</italic> co-occurred with all other Talitridae species, whereas <italic>C. garbinii</italic> co-occurred only with <italic>P. platensis</italic>.</p></abstract>

Four Talitridae species have been recorded in the southern Baltic Sea, including two indigenous species – Talitrus saltator, Deshayesorchestia deshayesii, and two presumably non-indigenous ones – Cryptorchestia garbinii, Platorchestia platensis. It has been twelve years since Platorchestia platensis was recorded for the first time. The distribution and abundance of talitrids have not been studied since the 1990s. Therefore, the main objective of this research was to document the occurrence in Talitridae in the region in order to determine whether non-indigenous P. platensis has spread and whether it co-occurs with indigenous species. Talitrids were recorded at 20 out of 43 sampling sites. T. saltator occurred both along the coast of the open sea and in the Gulf of Gdańsk. The remaining species were found only around the gulf. P. platensis was more abundant than other species and its density was positively correlated with wrack biomass. Our studies have shown that the area of T. saltator occurrence has decreased during the last two decades. Non-indigenous species P. platensis co-occurred with all other Talitridae species, whereas C. garbinii co-occurred only with P. platensis.

Distribution and abundance of Talitridae in the southern Baltic Sea – twelve years after the first record of <italic>Platorchestia platensis</italic> (Krøyer, 1845) in 2005

Oceanological and Hydrobiological Studies

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Distribution and abundance of Talitridae in the southern Baltic Sea – twelve years after the first record of  (Krøyer, 1845) in 2005

Four Talitridae species have been recorded in the southern Baltic Sea, including two indigenous species – Talitrus saltator, Deshayesorchestia deshayesii, and...

Distribution and abundance of Talitridae in the southern Baltic Sea – twelve years after the first record of Platorchestia platensis (Krøyer, 1845) in 2005

Article Category: Original research paper

Pubblicato online: 14 mar 2019

Pagine: 66 - 75

Ricevuto: 04 lug 2018

Accettato: 13 set 2018

DOI: https://doi.org/10.1515/ohs-2019-0007

© 2019 Faculty of Oceanography and Geography, University of Gdańsk, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.