Decline of a Horseshoe Crab Population on Cape Cod

1999 ◽  
Vol 197 (2) ◽  
pp. 300-302 ◽  
Author(s):  
J. W. Widener ◽  
R. B. Barlow
Keyword(s):  
Horseshoe Crab ◽  
Cape Cod ◽  
Crab Population ◽  
Horseshoe Crab Population

scholarly journals Citizen science frontiers horseshoe crab population regain at their spawning beach in East Peninsular Malaysia

2019 ◽  
Vol 232 ◽  
pp. 1012-1020 ◽  
Author(s):  
Nurul Ashikin Mat Zauki ◽  
Behara Satyanarayana ◽  
Nur Fairuz-Fozi ◽  
Bryan Raveen Nelson ◽  
Melissa Beata Martin ◽  
...  
Keyword(s):  
Citizen Science ◽  
Horseshoe Crab ◽  
Peninsular Malaysia ◽  
Crab Population ◽  
Horseshoe Crab Population

scholarly journals Assessment of Genetic Variation in COI Gene of Horseshoe Crab (Tachypleus Gigas) Population Along the Coast of the Bay of Bengal in Odisha, India

2021 ◽  
Author(s):  
Sanatan Tudu ◽  
SANDEEP KUMAR GUPTA ◽  
Bisnu Prasad Dash
Keyword(s):  
Genetic Variation ◽  
South China ◽  
Bay Of Bengal ◽  
Horseshoe Crab ◽  
Indian Population ◽  
Haplotype Diversity ◽  
Vital Role ◽  
Coi Gene ◽  
Horseshoe Crab Population ◽  
Two Populations

Abstract Horseshoe crab (Tachypleus gigas) is an archaic group of marine creature which plays a vital role in the saline ecosystem. Many researchers emphasize and enhance the knowledge about the horseshoe crab's basic biology, morphology, and ecology, whereas very little information is available about its population genetics. We attempted to develop a baseline database about the ecology, phylogeography, and genetic variation among the horseshoe crab population from Odisha, India. We collected 152 samples of horseshoe crab from the coastal area of the Bay of Bengal. The generated Cytochrome C Oxidase Subunit I gene (COI) sequences of T. gigas were compared with the sequences of T. gigas obtained from GenBank. The GenBank sequences were of two populations from South China and Malaysia. A total of 26 unique haplotypes were observed in three populations of T. gigas. Pairwise F-statistic distance (FST) between South China-India was 0.708; Malaysia-India was 0.608, and South China-Malaysia was 0.136. It indicated that the South China population was closely related to the Malaysian population and the Indian population was appeared to be genetically distinct from the other two populations. It signifies the ecological importance of the Indian population. Furthermore, the migrant per generation (Nm) was 0.16, which indicated a low gene flow among T. gigas populations. The haplotype diversity (Hd) and nucleotide diversity (π) were 0.58826 and 0.00476, respectively. This study would help lay future strategy and conservation of horseshoe crab across the Bay of Bengal.

Life History Analysis of the Juvenile Horseshoe Crab in Pleasant Bay, Cape Cod

2004 ◽  
Vol 207 (2) ◽  
pp. 175-175 ◽  
Author(s):  
Sarah B. Cierpich ◽  
Sara P. Grady ◽  
Ivan Valiela
Keyword(s):  
Life History ◽  
Horseshoe Crab ◽  
Cape Cod ◽  
History Analysis

scholarly journals Tri-Spine Horseshoe Crab Aquaculture, Ranching and Stock Enhancement: Perspectives and Challenges

2021 ◽  
Vol 8 ◽  
Author(s):  
Peng Xu ◽  
Haiwei Bai ◽  
Xiaoyong Xie ◽  
Chun-Chieh Wang ◽  
Xing Huang ◽  
...  
Keyword(s):  
Mass Culture ◽  
Horseshoe Crab ◽  
Captive Breeding ◽  
Stock Enhancement ◽  
Population Declines ◽  
Living Fossil ◽  
Growth And Survival ◽  
Research Activities ◽  
Rearing Techniques ◽  
Horseshoe Crab Population

As a well-known example of “living fossil,” horseshoe crabs are ecologically significant macroinvertebrates in coastal and estuarine ecosystems. The tri-spine horseshoe crab, Tachypleus tridentatus, has been widely utilized for Tachypleus amebocyte lysate production and food consumption since the 1980s, which led to considerable population declines along the west coast of the Pacific Ocean. The declining horseshoe crab population is expected to have ecological and social impacts. Stock enhancement through captive rearing of juveniles is cited as an important alternative to repopulate the native T. tridentatus, which in turn supports sustainable resource utilization and research activities. The hatchery production techniques for this species have gradually developed following the mass culture efforts in Japan since the late 1980s. However, the previous studies have primarily concerned the feed types and husbandry conditions to maximize the growth and survival of the juveniles. Little is known about the practicability and effectiveness of releasing large numbers of hatchery-bred individuals through releasing programs. In this review, we (1) summarize the available captive breeding and rearing techniques, (2) discuss the release strategies that could potentially improve the survival of released juveniles, and (3) identify the future opportunities and challenges in establishing technical frameworks to support responsible stock enhancement programs for T. tridentatus. The information should benefit future horseshoe crab fisheries management efforts in the attempt to restore the severely depleted populations.

scholarly journals The consequences of climate change at an avian influenza ‘hotspot’

2012 ◽  
Vol 8 (6) ◽  
pp. 1036-1039 ◽  
Author(s):  
V. L. Brown ◽  
Pejman Rohani
Keyword(s):  
Climate Change ◽  
Avian Influenza ◽  
Population Size ◽  
Horseshoe Crab ◽  
Bird Species ◽  
Influenza Viruses ◽  
Transmission Model ◽  
Avian Influenza Viruses ◽  
Population Sizes ◽  
Horseshoe Crab Population

Avian influenza viruses (AIVs) pose significant danger to human health. A key step in managing this threat is understanding the maintenance of AIVs in wild birds, their natural reservoir. Ruddy turnstones ( Arenaria interpres ) are an atypical bird species in this regard, annually experiencing high AIV prevalence in only one location—Delaware Bay, USA, during their spring migration. While there, they congregate on beaches, attracted by the super-abundance of horseshoe crab eggs. A relationship between ruddy turnstone and horseshoe crab ( Limulus polyphemus ) population sizes has been established, with a declining horseshoe crab population linked to a corresponding drop in ruddy turnstone population sizes. The effect of this interaction on AIV prevalence in ruddy turnstones has also been addressed. Here, we employ a transmission model to investigate how the interaction between these two species is likely to be altered by climate change. We explore the consequences of this modified interaction on both ruddy turnstone population size and AIV prevalence and show that, if climate change leads to a large enough mismatch in species phenology, AIV prevalence in ruddy turnstones will increase even as their population size decreases.

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