Adult specimens of Eriocheir ogasawaraensis, endemic to the Ogasawara Islands, collected in March, 2004, in Chichi-jima, Ogasawara, Japan, in dorsal view: female, 82 mm in carapace width (upper), male, 81 mm in carapace width (lower). Kobayashi and Satake in this issue compare the morphology of this endemic crab to that of its ontinental congener, the Japanese mitten crab, Eriocheir japonica, finding differences in sexual dimorphism. Photo: Satoshi Kobayashi.
This quarterly issue of Pacific Science explores new research about Pacific crabs, fish, plankton, birds, grass, frogs, and eels.
The opening article examines fish in the aftermath of the 2011 Tohoku 9.0 magnitude earthquake and tsunami at the Fukushima Daiichi Nuclear Power Plant. From the abstract:
Thirteen commonly consumed types of fish caught in the North Pacific and locally available in Hawai‘i were analyzed using gamma spectroscopy to measure Fukushima-derived and historic 134Cs and 137Cs isotopes. All fish samples had detectable 137Cs above 95% confidence intervals. Three out of the thirteen samples had 134Cs, an isotope indicative of Fukushima releases, detected above 95% confidence intervals. The highest 134Cs and 137Cs concentration in the examined species was in ‘ahi tuna, carrying 0.10 ± 0.04 Bq/ kg and 0.62 ± 0.05 Bq/ kg, respectively. Other samples with 134Cs activities found above their 2-sigma uncertainty were albacore tuna and swordfish. Historic and Fukushima-derived contributions were evaluated, and in several samples the Fukushima-derived radiocesium dominated the total radiocesium inventory with up to 61% contribution. All activities were below derived intervention limits of 1,200 Bq/ kg, and the doses to humans from consuming the fish attributable to radiocesium were 0.02 – 0.2 μ Sv, in comparison to 6 – 20 μ Sv contributed by the natural 40K present in the same fish.
Scholarly articles in this issue:
From ‘Range Expansion of the Small Carpenter Bee Ceratina smaragdula across the Hawaiian Archipelago with Potential Ecological Implications for Native Pollinator Systems’ in this issue. Female (left) and male (right) Ceratina (Pithitis) smaragdula: face, a, b; dorsal view, c, d; lateral view, e, f. Body length is between 6 and 8 mm on average. Note relatively prominent facial maculation and black abdominal patches of the male.
Preview Pacific Science, vol. 71 no. 1 with the following article free for all from Bio-One:
Also inside this quarter’s issue, Wyatt A. Shell examines small green carpenter bee range expansion in Hawai’i:
Invasive bee species may have a widely detrimental impact on their novel host ecosystem. Introduced bees can rapidly disrupt native plantpollinator mutualisms through competition with indigenous pollinator fauna and facilitation of invasive flora reproduction. […] Here we present a comprehensive synthesis of C. smaragdula’s known biological and ecological history, as well as a population genetic analysis of C. smaragdula from Maui, and from locations across its native range, at the cytochrome oxidase I (COI ) locus. We update C. smaragdula’s known distribution and occurrence elevation in Hawai‘i and reveal a lack of genetic structure between Hawaiian and native range populations.
Scholarly articles in this issue:
From Identity and Distribution of Introduced Slugs ( Veronicellidae) in the Hawaiian and Samoan Islands in this issue. Photographs and drawings of three veronicellid species dissected to show structures used to distinguish them. 1: Veronicella cubensis (representative specimen from Hawai‘i); 2: Laevicaulis alte (representative specimen from Hawai‘i); 3: Sarasinula plebeia [no live specimen was available for dissection; this illustration is of the “plesiotype” of Thomé (1971) in the Muséum nationale d’Histoire naturelle, Paris, mnhn 21307]. Key reproductive structures that differ among the species: a, penis; b, digitiform gland papilla; c, digitiform tubules.
Pacific Science, vol. 70 no. 4 is now available and contains the following articles:
- Spatial Scale, Genetic Structure, and Speciation of Hawaiian Endemic Yeasts by Marc-André Lachance, Julie D. Collens, Xiao Feng Peng, Alison M. Wardlaw, Lucie Bishop, Lily Y. Hou, and William T. Starmer
- Alien Insects Dominate the Plant-Pollinator Network of a Hawaiian Coastal Ecosystem by Kimberly Shay, Donald R. Drake, Andrew D. Taylor, Heather F. Sahli, Melody Euaparadorn, Michelle Akamine, Jennifer Imamura, Doug Powless, and Patrick Aldrich
- Avian Abundances on Yap, Federated States of Micronesia, after Typhoon Sudall by W. Douglas Robinson and Tara R. Robinson
- Habitat Use and Status of the Bokikokiko or Christmas Island Warbler (Acrocephalus aequinoctialis) by Eric A. VanderWerf, Ray Pierce, Ratita Bebe, and Katareti Taabu
- Temporal Variation in Macro-Moth Abundance and Species Richness in a Lowland Fijian Forest by Siteri Tikoca, Simon Hodge, Sarah Pene, John Clayton, Marika Tuiwawa, and Gilianne Brodie
- Seasonal Growth Fluctuations of Four Species of Neritid Gastropods in an Upper Mangrove Estuary, Ishigaki Island, Japan by Yoshitake Takada
- Identity and Distribution of Introduced Slugs (Veronicellidae) in the Hawaiian and Samoan Islands by Jaynee R. Kim, Kenneth A. Hayes, Norine W. Yeung, and Robert H. Cowie
- Eleotris bosetoi ( Teleostei: Gobioidei: Eleotridae), a New Species of Freshwater Fish from the Solomon Islands by Marion I. Mennesson, Philippe Keith, Brendan C. Ebner, and Philippe Gerbeaux
- First Record of Bryozoan Amathia (= Zoobotryon) verticillata (Bryozoa: Vesiculariidae) from Taiwan by Dan Minchin, Ta-Kang Liu, and Muhan Cheng
From article “Biology and Impacts of Pacific Islands Invasive Species,” in this issue. Mikania micrantha flower clusters (top left), seed clusters (top right), seeds (bottom left), and sprouting from a node (bottom right).
Pacific Science, vol. 70 no. 3 is now available and contains the following articles:
- Biology and Impacts of Pacific Islands Invasive Species. 13. Mikania micrantha Kunth (Asteraceae) by Michael D. Day, David R. Clements, Christine Gile, Wilmot K. A. D. Senaratne, Shicai Shen, Leslie A. Weston, and Fudou Zhang
- Trends in Marine Foraging in Precontact and Historic Leeward Kohala, Hawai‘i Island by Julie S. Field, Jacqueline N. Lipphardt, and Patrick V. Kirch
- Patterns of Floral Visitation to Native Hawaiian Plants in Presence and Absence of Invasive Argentine Ants by Heather F. Sahli, Paul D. Krushelnycky, Donald R. Drake, and Andrew D. Taylor
- Home Range Estimates of Feral Cats (Felis catus) on Rota Island and Determining Asymptotic Convergence by Brian T. Leo, James J. Anderson, Reese Brand Phillips, and Renee R. Ha
- Nutrient and Organic Matter Inputs to Hawaiian Anchialine Ponds: Influences of N-Fixing and Non-N-Fixing Trees by Kehauwealani K. Nelson-Kaula, Rebecca Ostertag, R. Flint Hughes, and Bruce D. Dudley
- Feasibility of Using Passive Integrated Transponder Technology for Studying the Ecology of Juvenile Striped Mullet (Mugil cephalus) in Streams by Kauaoa M. S. Fraiola and Stephanie M. Carlson
- Molecular Phylogeny, Revised Higher Classification, and Implications for Conservation of Endangered Hawaiian Leaf-Mining Moths (Lepidoptera: Gracillariidae: Philodoria) by Chris A. Johns, Matthew R. Moore, and Akito Y. Kawahara
- Helminths of Five Species of Gonocephalus Lizards (Squamata: Agamidae) from Peninsular Malaysia by Stephen R. Goldberg, Charles R. Bursey, and L. Lee Grismer
Photo by David R. Sischo
A fourth generation Achatinella fuscobasis born into captivity at the University of Hawai’i’s tree-snail captive rearing facility. This population’s wild counterparts were long ago wiped out by invasive predators. In this issue David R. Sischo examines genetic and demographic trends in the captive population over a period of more than 20 years.
Pacific Science, Vol. 70#2, April 2016, is now out and contains the following works:
“Genetic and Demographic Insights into the Decline of a Captive Population of the Endangered Hawaiian Tree Snail Achatinella fuscobasis (Achatinellinae)”
David R. Sischo, Melissa R. Price, Mark- Anthony Pascua, and Michael G. Hadfi eld, 133 Continue reading