Seasonal Occurrence and Abundance of Free-Swimming Copepod Nauplii in Narragansett Bay

1966 ◽  
Vol 23 (3) ◽  
pp. 415-422 ◽  
Author(s):  
Daniel J. Faber
Keyword(s):  
North America ◽  
Relative Abundance ◽  
East Coast ◽  
Narragansett Bay ◽  
Seasonal Abundance ◽  
Seasonal Occurrence ◽  
Individual Species ◽  
The West ◽  
Free Swimming ◽  
The Individual

Night, surface zooplankton samples at one position in the West Passage of Narragansett Bay yielded 10 calanoid, three cyclopoid, and one harpacticoid species of free-swimming copepod nauplii. The seasonal abundance of all species of nauplii combined during the 12 months of study showed significant peaks in spring and mid summer. The holoplankters were grouped into four seasonal categories: summer–fall, winter–spring, spring, and year-round; the meroplankters were put in another category. The first two groups dominated the collections. The seasonal occurrence and relative abundance of the individual species of nauplii is shown for the period of study. Included is a short synopsis of the geographical distribution of the adults along the east coast of North America as recorded in the literature.

Free-Swimming Copepod Nauplii of Narragansett Bay with a Key to Their Identification

1966 ◽  
Vol 23 (2) ◽  
pp. 189-205 ◽  
Author(s):  
Daniel J. Faber
Keyword(s):  
Narragansett Bay ◽  
The West ◽  
Free Swimming ◽  
Surface Samples ◽  
Plankton Sampler

Zooplankton surface samples were taken with a number 12 silk bolting cloth net towed by a Clark-Bumpus quantitative plankton sampler in Narragansett Bay for 12 months. The samples were collected twice weekly, except during December, January, and February, at night at one position in the West Passage of Narragansett Bay. Ten calanoid, three cyclopoid, and one harpacticoid species of free-swimming copepod nauplii were collected from July 1957 through June 1958. The structure and arrangement of elements of the caudal armatures of these copepod nauplii showed certain differences which were utilized to develop a key.

scholarly journals Monarch butterflies cross the Appalachians from the west to recolonize the east coast of North America

2010 ◽  
Vol 7 (1) ◽  
pp. 43-46 ◽  
Author(s):  
Nathan G. Miller ◽  
Leonard I. Wassenaar ◽  
Keith A. Hobson ◽  
D. Ryan Norris
Keyword(s):  
North America ◽  
Direct Evidence ◽  
East Coast ◽  
Gulf Coast ◽  
Danaus Plexippus ◽  
Early Spring ◽  
Eastern United States ◽  
The West ◽  
Monarch Butterflies ◽  
The Usa

Each spring, millions of monarch butterflies ( Danaus plexippus ) migrate from overwintering sites in Mexico to recolonize eastern North America. However, few monarchs are found along the east coast of the USA until mid-summer. Brower (Brower, L. P. 1996 J. Exp. Biol. 199, 93–103.) proposed that east coast recolonization is accomplished by individuals migrating from the west over the Appalachians, but to date no evidence exists to support this hypothesis. We used hydrogen ( δ D) and carbon ( δ 13 C) stable isotope measurements to estimate natal origins of 90 monarchs sampled from 17 sites along the eastern United States coast. We found the majority of monarchs (88%) originated in the mid-west and Great Lakes regions, providing, to our knowledge, the first direct evidence that second generation monarchs born in June complete a ( trans -) longitudinal migration across the Appalachian mountains. The remaining individuals (12%) originated from parents that migrated directly from the Gulf coast during early spring. Our results provide evidence of a west to east longitudinal migration and provide additional rationale for conserving east coast populations by identifying breeding sources.

scholarly journals Revision of the Baeoglena species of the West Palaearctic Region (Coleoptera: Staphylinidae: Aleocharinae)

2019 ◽  
Vol 69 (1) ◽  
pp. 001-032
Author(s):  
Volker Assing
Keyword(s):  
Canary Islands ◽  
Distribution Patterns ◽  
Palaearctic Region ◽  
Individual Species ◽  
The West ◽  
Public And Private ◽  
Parapatric Distribution ◽  
Taxonomic Confusion ◽  
The Individual ◽  
Private Collections

The subgenus Baeoglena Thomson, 1867 of the speciose aleocharine genus Oxypoda Mannerheim, 1830 has been subject to considerable taxonomic confusion rendering a reliable identification of material from regions other than Central Europe and the Canary Islands virtually impossible. Based on a revision of abundant material from various major public and private collections, seven species are distributed in the West Palaearctic region exclusive of the Canary Islands. Two new species are described and illustrated: Oxypoda (Baeoglena) rectacia spec. nov. (East Mediterranean, from South Greece to the Middle East) and O. (B.) derecta spec. nov. (West Caucasus, Northeast Anatolia). Diagnoses and illustrations of the genitalia are provided for the remaining five species. The following synonymies are established: Oxypoda nova Bernhauer, 1902 = O. giachinoi Pace, 2001, syn. nov.; O. hispanica Fagel, 1958 and its replacement name O. inexpectata Fagel, 1965 are removed from synonymy with O. praecox Erichson, 1839 and synonymized with O. fusina Mulsant & Rey, 1875. Oxypoda recondita Kraatz, 1856 and O. dalmatina Bernhauer, 1905 are excluded from Baeoglena and moved to the subgenus Bessopora Thomson, 1859. Lectotypes are designated for Oxypoda nova Bernhauer, 1902, O. caucasica Bernhauer, 1902, and O. kuehnelti Scheerpeltz, 1963. An outline of the taxonomic history, a diagnosis of the subgenus, a checklist, and a key to species are provided. A zoogeographic analysis revealed some remarkably discontinuous distributions and parapatric distribution patterns which are plausibly explained only with interspecific competition among Baeoglena species. The distributions of the subgenus as a whole and of the individual species in the West Palaearctic region are mapped.   Taxonomic acts Oxypoda rectacia spec. nov. – urn:lsid:zoobank.org:act:8E5A6F28-9AD3-474E-99F8-9CBA0F85C4DC Oxypoda derecta spec. nov. – urn:lsid:zoobank.org:act:4C73E05F-20F7-4697-A4BA-D9E030B28A27

scholarly journals Searching for Franklin where he was ordered to go: Captain Erasmus Ommanney's sledging campaign to Cape Walker and beyond, spring 1851

Polar Record ◽  
2016 ◽  
Vol 52 (4) ◽  
pp. 474-498
Author(s):  
W. Barr
Keyword(s):  
North America ◽  
West Coast ◽  
East Coast ◽  
The West ◽  
Northwest Passage ◽  
Ice Conditions ◽  
To Come ◽  
Detailed Search ◽  
Northeast Coast

ABSTRACTSince the Admiralty's instructions to Captain Sir John Franklin for his attempt at a transit of the northwest passage in HMS Erebus and Terror in 1845 specified that he should proceed to Cape Walker at the northeastern tip of Russell Island, and head southwest from there to the waterways already explored along the mainland coast of North America, as far as ice conditions and any intervening land permitted, it was natural that the first search expedition to come within striking distance of Cape Walker, should make this one of the starting points of its detailed search. This was the squadron of Captain Horatio Austin that wintered off the northeast coast of Griffith Island in 1850–1851. Following his orders, in the spring of 1851 Captain Erasmus Ommanney of HMS Assistance set off with an impressive cavalcade of seven man-hauled sledges, most of them support sledges. From Cape Walker Lt. William Browne searched the east coast of Prince of Wales Island, that is the western shores of Peel Sound while Ommanney himself and Lt. Sherard Osborn searched the west coast of Prince of Wales Island, that is the east shore of McClintock Channel. No traces of Franklin's expedition were found. Their conclusions were that both McClintock Channel and Peel Sound were permanently blocked with ice, and that Franklin's ships could not have travelled south by either route. While the conclusion as regards McClintock Channel was absolutely correct, that with regard to Peel Sound was incorrect. This must have been the route whereby Erebus and Terror had reached the vicinity of King William Island, and the conclusion that Peel Sound never cleared of ice was very unfortunate in that the next search expedition dispatched by the Admiralty, that of Captain Sir Edward Belcher in 1852–1854 made no attempt to penetrate south, when it is possible that Peel Sound was clear of ice.

scholarly journals Quantification of migrant hoverfly movements (Diptera: Syrphidae) on the West Coast of North America

2019 ◽  
Vol 6 (4) ◽  
pp. 190153 ◽  
Author(s):  
Myles H. M. Menz ◽  
Brian V. Brown ◽  
Karl R. Wotton
Keyword(s):  
North America ◽  
West Coast ◽  
Life Histories ◽  
East Coast ◽  
Seasonal Migration ◽  
Science Data ◽  
The West ◽  
Video Footage ◽  
San Luis ◽  
The Usa

The seasonal migration of huge numbers of hoverflies is frequently reported in Europe from mountain passes or spurs of land. The movement of such large numbers of beneficial insects is thought to provide significant ecosystem services in terms of pollination and pest control. Observations from the East Coast of the USA during the 1920s indicate the presence of migratory life histories among some hoverfly species there, but 90 years have now passed since the last reported observation of hoverfly migration in the USA. Here, we analyse video footage taken during a huge northward migration of hoverflies on 20 April 2017 on the West Coast of California. The quantification of migrant numbers from this footage allows us to estimate the passage of over 100 000 hoverflies in half an hour over a 200 m section of headland in Montaña de Oro State Park (San Luis Obispo County). Field collections and analysis of citizen science data indicate different species from the previously reported Eristalis tenax migrations on the East Coast of the USA and provide evidence for migration among North American hoverflies. We wish to raise awareness of this phenomenon and suggest approaches to advance the study of hoverfly migration in North America and elsewhere.

scholarly journals ON FOUR NEW CALIFORNIAN HEPIALI

1876 ◽  
Vol 8 (9) ◽  
pp. 174-175 ◽  
Author(s):  
James Behrens
Keyword(s):  
North America ◽  
East Coast ◽  
The West

The species described in this paper are from Mendocino. The genus seems to be more numerously represented on the West than on the East Coast of North America. Some of the new forms resemble the Eutopean. To none of these species can I refer Dr. Boisduval's descriptions of hectoides or californicus.

scholarly journals Are tidal predictions a good guide to future extremes? – a critique of the Witness King Tides Project

2020 ◽  
Author(s):  
John Hunter
Keyword(s):  
North America ◽  
West Coast ◽  
East Coast ◽  
Tide Gauge ◽  
Tide Gauge Records ◽  
The West ◽  
The World ◽  
The Usa ◽  
Good Guide ◽  
Using Data

Abstract. An analysis of the viability of the Witness King Tides Project (hereafter called WKT) using data from the GESLA-2 database of quasi-global tide-gauge records is described. The results indicate regions of the world where WKT should perform well (e.g. the west coast of the USA) and others where it would not (e.g. the east coast of North America). Recommendations are made both for assessments that should be made prior to a WKT project, and also for an alternative to WKT projects.

Communities and Habitats

2004 ◽  
Author(s):  
Don Moll ◽  
Edward O. Moll
Keyword(s):  
Species Composition ◽  
Relative Abundance ◽  
Higher Plants ◽  
Flood Plain ◽  
Individual Species ◽  
Similar Species ◽  
Habitat Features ◽  
Biological Survey ◽  
Fall Line ◽  
The Individual

Rivers are dynamic and diverse ecosystems composed of a variety of habitats including the main channel, side channel, flood plain and backwater lakes as discussed briefly in chapter 2. Each habitat typically contains a characteristic assemblage of turtles (herein considered synonymous with a chelonian community). Although riverine chelonians may appear anywhere in the river, most species specialize in one or more habitats where they occur in maximum numbers and biomass. Thus, the various habitats of the river may have similar species composition but the rank abundance for each species will differ. Basic divisions of typical rivers are lotic (flowing water) habitats and the lentic (still water) habitats. Beyond this, habitat divisions involve such physical features as gradient (headwaters versus lower reaches), substrate (sand, gravel, and mud), size (feeder streams versus the river proper), shoreline heterogeneity (wooded, marsh, swamp, etc.) and even temperature. One can expect differences in species composition associated with any of these habitat features. The composition of river turtle communities is affected by the biotic as well as the physical environment of the stream. The presence or absence of lower and higher plants, competing species, or predators can all affect community composition. This chapter is chiefly concerned with assemblages of species rather than the individual species comprising these groups. It will examine the composition of river turtle communities, their ecology, and their evolution. The concept that organisms occur in assemblages of species interacting to produce distinctive community characteristics was neglected for many years in the herpetological literature. Prior to the mid-1960s, most ecological research on reptiles was autecological (Scott, 1982). Nevertheless, a scattering of early papers described chelonian assemblages associated with particular habitats. Evermann and Clark’s biological survey of Lake Maxinkuckee in 1920 included an overview of the turtle community. In 1942, Fred Cagle delineated the species composition and relative abundance of turtles inhabiting six lentic habitats in southern Illinois. In 1950 he published a similar report with A. H. Chaney on ten lentic and two lotic habitats in Louisiana. Tinkle (1959) compared the species composition and relative abundance of species above and below the “fall line” in five United States rivers emptying into the Gulf of Mexico.

The vertical distribution and diurnal migrations of calanoid copepods collected on the Sond cruise, 1965 IV. Systematic account of families Lucicutiidae to Candaciidae. the relative abundance of the numerically most important genera

1972 ◽  
Vol 52 (4) ◽  
pp. 1021-1044 ◽  
Author(s):  
H. S. J. Roe
Keyword(s):  
Water Column ◽  
Relative Abundance ◽  
Vertical Migration ◽  
Individual Species ◽  
Calanoid Copepods ◽  
Systematic Account ◽  
Surface Samples ◽  
Vertical Distributions ◽  
Size Groups ◽  
The Individual

The vertical distributions and diurnal migrations are analysed for nineteen species of calanoid copepods in the families Lucicutiidae up to and including the Candaciidae. The relative abundance, both vertical and horizontal, is given for each species.With few exceptions most of these species show little or no vertical migration. There is some suggestion of a reversed (downward) migration for Paracandacia bispinosa andP. simplex but since there are difficulties in analysing the surface samples the evidence is inconclusive. The species which are abundant in the family Heterorhabdidae all have little or no vertical migration and are at least partially vertically segregated by both day and night. Phyllopus impar and P. helgae are clearly vertically segregated and Haloptilus acutifrons and, to a lesser extent, H. ornatus each have two vertically separated populations by both day and night. Two size groups are present in each sex of Lucicutia flavicornis.The vertical distributions and numbers throughout the water column are analysed for 203 and 176 species in the day and night series respectively; it is concluded that while many species are relatively abundant at one or more particular depth most of them are numerically relatively insignificant in the water column as a whole. Only two species (day) and four species (night) formed more than 5 % of the total numbers caught in their respective series.The relative abundance, both vertical and horizontal, of the commonest genera are analysed. In the whole water column the relative abundance of most of the genera is constant by both day and night, and, as with the individual species, most of them are relatively scarce.

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