Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea
In many tropical nations, coastal communities seek to manage their sea cucumber fisheries by establishing locally managed marine areas on their traditional fishing grounds. These managed areas can protect spawning stocks, however the extent to which they help to replenish nearby sea cucumber fisheri...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2024-04-01
|
| Series: | Frontiers in Marine Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fmars.2024.1380235/full |
| _version_ | 1797201964661997568 |
|---|---|
| author | Peter Waldie David A. Feary Michael Bode Manuai Matawai Hugo B. Harrison Michael L. Berumen Chris Molai Maunoa Karo Richard J. Hamilton Richard J. Hamilton |
| author_facet | Peter Waldie David A. Feary Michael Bode Manuai Matawai Hugo B. Harrison Michael L. Berumen Chris Molai Maunoa Karo Richard J. Hamilton Richard J. Hamilton |
| author_sort | Peter Waldie |
| collection | DOAJ |
| description | In many tropical nations, coastal communities seek to manage their sea cucumber fisheries by establishing locally managed marine areas on their traditional fishing grounds. These managed areas can protect spawning stocks, however the extent to which they help to replenish nearby sea cucumber fisheries is debated, as nothing is known about the scales at which sea cucumber larvae disperse. In this study, we used genetic parentage analyses and statistical modelling to provide the first empirical measure of larval dispersal patterns for a sea cucumber species. We analysed tissue samples from 765 adult and 827 juvenile sandfish (Holothuria scabra) collected from five traditional fishing grounds of the Titan tribe, from Manus Province, Papua New Guinea. All adults were sampled from the Pere fishing grounds (the larval source area), with juveniles sampled from the Pere, Mbunai, Tawi, Timonai and Mbuke fishing grounds. Parentage analysis identified 15 juveniles that were the offspring of parents sampled from Pere fishing grounds, with six of these juveniles located in the same fishing grounds as their parents. The best-fit larval dispersal kernel predicted that the average H. scabra larvae travelled 15 km from its spawning location, with 50% of larvae settling within 6.7 km of their parents and 95% of larvae settling within 59 km of their parents. These results suggest that the Titan tribes’ desire to protect their H. scabra spawning stocks by establishing a network of locally managed marine areas across 65 km of continuous coastline is a culturally appropriate strategy, which has merit from both an ecological and fisheries standpoint. |
| first_indexed | 2024-04-24T07:55:55Z |
| format | Article |
| id | doaj.art-49eb91bf21d7486caac9aa2d0ff5091a |
| institution | Directory Open Access Journal |
| issn | 2296-7745 |
| language | English |
| last_indexed | 2024-04-24T07:55:55Z |
| publishDate | 2024-04-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Marine Science |
| spelling | doaj.art-49eb91bf21d7486caac9aa2d0ff5091a2024-04-18T06:32:08ZengFrontiers Media S.A.Frontiers in Marine Science2296-77452024-04-011110.3389/fmars.2024.13802351380235Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New GuineaPeter Waldie0David A. Feary1Michael Bode2Manuai Matawai3Hugo B. Harrison4Michael L. Berumen5Chris Molai6Maunoa Karo7Richard J. Hamilton8Richard J. Hamilton9Honiara Office, The Nature Conservancy, Rove, Solomon IslandsGeneral Organization for Conservation of Coral Reefs and Turtles in the Red Sea, Jeddah, Saudi ArabiaSchool of Mathematical Sciences, Queensland University of Technology, Brisbane, QLD, AustraliaMwanus Endras Asi Resource Development Network, Lorengau, Papua New GuineaSchool of Biological Sciences, University of Bristol, Bristol, United KingdomRed Sea Research Center, Division of Biological and Environmental Science and Engineering, King Abdullah University of Science and Technology, Thuwal, Saudi ArabiaNational Fisheries Authority, Port Moresby, Papua New GuineaUniversity of Papua New Guinea, Port Moresby, Papua New GuineaAsia Pacific Resource Centre, The Nature Conservancy, South Brisbane, QLD, Australia0Coastal People Southern Skies Centre of Research Excellence, The Nature Conservancy, South Brisbane, QLD, AustraliaIn many tropical nations, coastal communities seek to manage their sea cucumber fisheries by establishing locally managed marine areas on their traditional fishing grounds. These managed areas can protect spawning stocks, however the extent to which they help to replenish nearby sea cucumber fisheries is debated, as nothing is known about the scales at which sea cucumber larvae disperse. In this study, we used genetic parentage analyses and statistical modelling to provide the first empirical measure of larval dispersal patterns for a sea cucumber species. We analysed tissue samples from 765 adult and 827 juvenile sandfish (Holothuria scabra) collected from five traditional fishing grounds of the Titan tribe, from Manus Province, Papua New Guinea. All adults were sampled from the Pere fishing grounds (the larval source area), with juveniles sampled from the Pere, Mbunai, Tawi, Timonai and Mbuke fishing grounds. Parentage analysis identified 15 juveniles that were the offspring of parents sampled from Pere fishing grounds, with six of these juveniles located in the same fishing grounds as their parents. The best-fit larval dispersal kernel predicted that the average H. scabra larvae travelled 15 km from its spawning location, with 50% of larvae settling within 6.7 km of their parents and 95% of larvae settling within 59 km of their parents. These results suggest that the Titan tribes’ desire to protect their H. scabra spawning stocks by establishing a network of locally managed marine areas across 65 km of continuous coastline is a culturally appropriate strategy, which has merit from both an ecological and fisheries standpoint.https://www.frontiersin.org/articles/10.3389/fmars.2024.1380235/fullcustomary marine tenureconnectivitylocally managed marine areasfisheries managementgenetic parentage analyseslarval dispersal |
| spellingShingle | Peter Waldie David A. Feary Michael Bode Manuai Matawai Hugo B. Harrison Michael L. Berumen Chris Molai Maunoa Karo Richard J. Hamilton Richard J. Hamilton Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea Frontiers in Marine Science customary marine tenure connectivity locally managed marine areas fisheries management genetic parentage analyses larval dispersal |
| title | Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea |
| title_full | Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea |
| title_fullStr | Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea |
| title_full_unstemmed | Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea |
| title_short | Dispersal patterns of sandfish (Holothuria scabra) larvae in Manus Province, Papua New Guinea |
| title_sort | dispersal patterns of sandfish holothuria scabra larvae in manus province papua new guinea |
| topic | customary marine tenure connectivity locally managed marine areas fisheries management genetic parentage analyses larval dispersal |
| url | https://www.frontiersin.org/articles/10.3389/fmars.2024.1380235/full |
| work_keys_str_mv | AT peterwaldie dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT davidafeary dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT michaelbode dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT manuaimatawai dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT hugobharrison dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT michaellberumen dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT chrismolai dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT maunoakaro dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT richardjhamilton dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea AT richardjhamilton dispersalpatternsofsandfishholothuriascabralarvaeinmanusprovincepapuanewguinea |