Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia

Abstract. Bachtiar I, Bachtiar NT. 2019. Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia. Biodiversitas 20: 971-977. Spawning of marine nyale worms has been an important component of Sasak tradition of Bau Nyale (fishing nyale) for ce...

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Autores principales: IMAM BACHTIAR, NAILA TASLIMAH BACHTIAR
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Publicado: MBI & UNS Solo 2019
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spelling oai:doaj.org-article:b6e1203b3b0346ad9bf6420aeb2fa80e2021-11-21T21:50:08ZPredicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia1412-033X2085-472210.13057/biodiv/d200406https://doaj.org/article/b6e1203b3b0346ad9bf6420aeb2fa80e2019-03-01T00:00:00Zhttps://smujo.id/biodiv/article/view/3656https://doaj.org/toc/1412-033Xhttps://doaj.org/toc/2085-4722Abstract. Bachtiar I, Bachtiar NT. 2019. Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia. Biodiversitas 20: 971-977. Spawning of marine nyale worms has been an important component of Sasak tradition of Bau Nyale (fishing nyale) for centuries and a tourism icon of the District of Lombok Tengah since the 1990s. Nyale is a mixture of epitokies of 3-5 species of Polychaeta worms (mostly Palola spp.) for reproduction. At present, prediction of spawning date of the nyale worms is carried out traditionally that might not satisfy demand of tourism market. The present study is to develop a scientific-based method for predicting date of nyale worms spawning or nyale swarming. Since available data are scarce, development of the method of data collection mainly uses analogy from polychaetes and other invertebrate reproduction patterns and any available information from traditional customs. Three hypotheses were developed to generate prediction for 100 years, from 2000 to 2100, and then these prediction dates were verified using available data before 2018. In the past 9 years, there are two mismatches between scientific and traditional predictions, i.e., 2015 and 2017 spawnings, in favor of the new prediction method. The new scientific prediction method provides more objective and accurate date of nyale worm spawning than the traditional method. The present prediction also shows that split spawning dates, February and March, do not come to pass every year, as traditional nyale fishers generally believe them. It is also found that nyale worms are consistently using international lunar calendar for its spawning date, instead of local and national lunar calendars. This study provided the first scientific nyale swarming prediction in Lombok to complement existing traditional prediction. The prediction is very useful to promote the biggest annual traditional festival in Lombok for international visitors.IMAM BACHTIARNAILA TASLIMAH BACHTIARMBI & UNS Soloarticlebau nyalepolychaeteculturalswarmingreproductionlombokBiology (General)QH301-705.5ENBiodiversitas, Vol 20, Iss 4, Pp 971-977 (2019)
institution DOAJ
collection DOAJ
language EN
topic bau nyale
polychaete
cultural
swarming
reproduction
lombok
Biology (General)
QH301-705.5
spellingShingle bau nyale
polychaete
cultural
swarming
reproduction
lombok
Biology (General)
QH301-705.5
IMAM BACHTIAR
NAILA TASLIMAH BACHTIAR
Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
description Abstract. Bachtiar I, Bachtiar NT. 2019. Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia. Biodiversitas 20: 971-977. Spawning of marine nyale worms has been an important component of Sasak tradition of Bau Nyale (fishing nyale) for centuries and a tourism icon of the District of Lombok Tengah since the 1990s. Nyale is a mixture of epitokies of 3-5 species of Polychaeta worms (mostly Palola spp.) for reproduction. At present, prediction of spawning date of the nyale worms is carried out traditionally that might not satisfy demand of tourism market. The present study is to develop a scientific-based method for predicting date of nyale worms spawning or nyale swarming. Since available data are scarce, development of the method of data collection mainly uses analogy from polychaetes and other invertebrate reproduction patterns and any available information from traditional customs. Three hypotheses were developed to generate prediction for 100 years, from 2000 to 2100, and then these prediction dates were verified using available data before 2018. In the past 9 years, there are two mismatches between scientific and traditional predictions, i.e., 2015 and 2017 spawnings, in favor of the new prediction method. The new scientific prediction method provides more objective and accurate date of nyale worm spawning than the traditional method. The present prediction also shows that split spawning dates, February and March, do not come to pass every year, as traditional nyale fishers generally believe them. It is also found that nyale worms are consistently using international lunar calendar for its spawning date, instead of local and national lunar calendars. This study provided the first scientific nyale swarming prediction in Lombok to complement existing traditional prediction. The prediction is very useful to promote the biggest annual traditional festival in Lombok for international visitors.
format article
author IMAM BACHTIAR
NAILA TASLIMAH BACHTIAR
author_facet IMAM BACHTIAR
NAILA TASLIMAH BACHTIAR
author_sort IMAM BACHTIAR
title Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
title_short Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
title_full Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
title_fullStr Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
title_full_unstemmed Predicting spawning date of nyale worms (Eunicidae, Polychaeta) in the southern coast of Lombok Island, Indonesia
title_sort predicting spawning date of nyale worms (eunicidae, polychaeta) in the southern coast of lombok island, indonesia
publisher MBI & UNS Solo
publishDate 2019
url https://doaj.org/article/b6e1203b3b0346ad9bf6420aeb2fa80e
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