NDLI: Sex-Specific Movement Response of an Estuarine Sciaenid (Cynoscion nebulosus) to Freshets

Content Provider	Springer Nature Link
Author	Callihan, Jody L. Cowan, James H. Harbison, Michael D.
Copyright Year	2014
Abstract	During a 2.5-year acoustic telemetry study in a Louisiana estuary (Calcasieu Lake), two major freshets occurred (peak river flows >350 m$^{3}$ s$^{−1}$) in separate years and seasons, which provided an opportunity to evaluate the movement response of adult spotted seatrout (Cynoscion nebulosus) to large pulses of freshwater entering the estuary. A total of 172 spotted seatrout (101 females, 49 males, and 22 fish whose sex was unknown) were implanted with acoustic transmitters (battery life ~1 year) and released across four separate tagging events in the spring and fall of both 2007 and 2008; the movements of these fish were monitored by an estuarine-wide array of 60 receivers. Both freshets considerably reduced salinities in the upper bay, from 15–20 to <5. Interestingly, spotted seatrout exhibited a sex-specific response to these freshet-induced low salinities (<5). During both freshets, males continued to utilize and remained in the upper bay, but females left the area and moved (>10 km) to the lower bay where salinities were higher (10–20). This sex-specific movement response to changing salinities has not been explored or demonstrated previously in spotted seatrout. Accordingly, these results provide environmental mangers with unique information on how salinity dynamics affect the accessibility of this economically and ecologically important species to both anglers and scientific surveys. This information also provides insight into how this species may respond to large-scale freshwater diversions that are being planned as part of coastal restoration efforts along the Gulf coast of the USA. More broadly, our results add to a limited but growing body of evidence that environmental preferences of estuarine and coastal fishes often differ between sexes and that the variable abiotic conditions, so characteristic of estuaries, can have important behavioral consequences for mobile organisms living in these systems.
Starting Page	1492
Ending Page	1504
Page Count	13
File Format	PDF
ISSN	15592723
Journal	Estuaries
Volume Number	38
Issue Number	5
e-ISSN	15592731
Language	English
Publisher	Springer US
Publisher Date	2014-09-16
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Freshet Movement Salinity Sex-specific preference Spotted seatrout Telemetry Environment Ecology Freshwater & Marine Ecology Environmental Management Coastal Sciences Water and Health
Content Type	Text
Resource Type	Article
Subject	Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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