TY - JOUR
T1 - Alien species stabilize local fisheries catch in a highly invaded ecosystem
AU - van Rijn, Itai
AU - Kiflawi, Moshe
AU - Belmaker, Jonathan
N1 - Funding Information:
This study was supported by The Ministry of Agriculture and Rural Development, Israel (grant number 891-0256-14). Itai Van Rijn was supported by the Mediterranean Sea Research Center of Israel (MERCI) and by the Manna Center for Food Safety and Security, Tel Aviv University. We wish to thank Captain Levi Ornoy and his crew for sharing their logbooks and Prof. Jonathan Belmaker’s laboratory members for assisting with digitalizing these handwritten data.
Publisher Copyright:
© 2020, Canadian Science Publishing. All rights reserved.
PY - 2020/1/1
Y1 - 2020/1/1
N2 - Alien species may be a valuable resource for marine fisheries, yet their contribution to the catch might be balanced by negative effects on indigenous species. In this study, we explored a unique high-resolution time series of catch data from a highly invaded ecosystem in the eastern Mediterranean. We analyzed over 5000 fishing hauls digitalizing from fishers’ logbooks. We found that the catch per unit effort (CPUE) of alien species increased over time, while for indigenous species, CPUE remained relatively stable between 1996 and 2013. This suggests a lack of competitive exclusion of indigenous target species due to the proliferation of alien species. From the perspective of the fishers’ revenues, alien species gradually became a more important part of the catch, while overall fishers’ revenues showed temporal stability. This was the combined result of alien species increasing CPUE and fishers shifting their effort toward shallower water where alien species were dominant. Our findings demonstrate that alien species can become a valuable resource for a local fishing industry with little effect on indigenous species, which is highly relevant to worldwide fisheries experiencing range redistribution of commercial species.
AB - Alien species may be a valuable resource for marine fisheries, yet their contribution to the catch might be balanced by negative effects on indigenous species. In this study, we explored a unique high-resolution time series of catch data from a highly invaded ecosystem in the eastern Mediterranean. We analyzed over 5000 fishing hauls digitalizing from fishers’ logbooks. We found that the catch per unit effort (CPUE) of alien species increased over time, while for indigenous species, CPUE remained relatively stable between 1996 and 2013. This suggests a lack of competitive exclusion of indigenous target species due to the proliferation of alien species. From the perspective of the fishers’ revenues, alien species gradually became a more important part of the catch, while overall fishers’ revenues showed temporal stability. This was the combined result of alien species increasing CPUE and fishers shifting their effort toward shallower water where alien species were dominant. Our findings demonstrate that alien species can become a valuable resource for a local fishing industry with little effect on indigenous species, which is highly relevant to worldwide fisheries experiencing range redistribution of commercial species.
UR - http://www.scopus.com/inward/record.url?scp=85084139987&partnerID=8YFLogxK
U2 - 10.1139/cjfas-2019-0065
DO - 10.1139/cjfas-2019-0065
M3 - Article
AN - SCOPUS:85084139987
VL - 77
SP - 752
EP - 761
JO - Canadian Journal of Fisheries and Aquatic Sciences
JF - Canadian Journal of Fisheries and Aquatic Sciences
SN - 0706-652X
IS - 4
ER -