Timing and location of spawning of Blue Grenadier, Macruronus novaezelandiae (Teleostei: Merlucciidae), In Australian Coastal Waters

1989 ◽  
Vol 40 (1) ◽  
pp. 97 ◽  
Author(s):  
JS Gunn ◽  
BD Bruce ◽  
DM Furlani ◽  
RE Thresher ◽  
SJM Blaber
Keyword(s):  
Geographical Distribution ◽  
West Coast ◽  
Coastal Waters ◽  
Lunar Cycle ◽  
Small Scale ◽  
The West ◽  
Gonad Morphology ◽  
North Eastern ◽  
Broad Scale

The geographical distribution and ages of larvae of the blue grenadier, Macruronus novaezelandiae, based on ichthyoplankton surveys in southern Australian waters in 1984 and 1985, indicate that the species spawns primarily off the west coast of Tasmania in winter, and may spawn on a lunar cycle. Winter spawning off Tasmania is also suggested by adult gonad morphology: gonado-somatic indices peaked in winter, and mature and spent individuals were collected off the west coast of Tasmania. Small numbers of larval blue grenadier were also collected off north-eastern Tasmania, suggesting the occurrence of small-scale and sporadic spawning in that area. The date of first spawning differed by a month between 1984 and 1985, and was apparently related to broad-scale interannual differences in the oceanography of southern Australian waters. Use of oceanographic features to retrocast spawning dates for blue grenadier suggests that shifts in the date of first spawning of approximately one month are common in this species.

scholarly journals Temporal and spatial patterns on serra, Scomberomorus brasiliensis (Teleostei, Scombridae), catches from the fisheries on the Maranhão coast, Brazil

2001 ◽  
Vol 61 (4) ◽  
pp. 541-546 ◽  
Author(s):  
V. da BATISTA ◽  
N. N. FABRÉ
Keyword(s):  
Spatial Patterns ◽  
Relative Abundance ◽  
West Coast ◽  
The West ◽  
Temporal And Spatial Patterns ◽  
Eastern Brazil ◽  
North Eastern ◽  
Displacement Pattern ◽  
Temporal And Spatial ◽  
Demersal Species

The displacement pattern of the serra, Scomberomorus brasiliensis, in North-eastern Brazil was analyzed from landing data recorded from the fleet fishing serra. Serra fishery has two seasons: from September to February (demersal species plus serra), and from March to August (almost only large amounts of serra). S. brasiliensis relative abundance increases similarly along the coast from March, but decreases first on the West coast from June. Records indicate that serra is near the coast at least until September/October in Eastern grounds. From October to March (strongest spawning season) there is no record of shoals on the coast. We concluded that the Maranhão coast is just a part of the migration circuit of S. brasiliensis that may exceed 300 nautical miles.

scholarly journals A taxonomic review of janthinid gastropod molluscs from California Current Waters off the west coast of North America

Zoosymposia ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 151-153
Author(s):  
ROGER R. SEAPY
Keyword(s):  
North America ◽  
West Coast ◽  
Coastal Waters ◽  
Morphological Characteristics ◽  
California Current ◽  
The West ◽  
Taxonomic Review ◽  
Taxonomic Characterization

Taxonomic characterization of janthinid gastropods, morphological characteristics, oceanic habitat and occurrence in coastal waters off the west coast of North America are reviewed. The two species (Janthina umbilicata and J. janthina) recorded from west coast waters are described and their shell morphologies illustrated.

Tendencies in the geographical distribution of the genus Mariscus (Cyperaceae) in southern Africa*

Bothalia ◽  
1983 ◽  
Vol 14 (3/4) ◽  
Author(s):  
P. J. Voster
Keyword(s):  
Geographical Distribution ◽  
Southern Africa ◽  
Environmental Conditions ◽  
West Coast ◽  
Summer Rainfall ◽  
Annual Rainfall ◽  
The West ◽  
Water Requirements ◽  
Winter Rainfall ◽  
Flora Of Southern Africa

The genus Mariscus occurs over practically the whole of the Flora of Southern Africa (FSA) region, with the exception of the west coast and the Karoo region of the Cape Province. Practically no species occur under conditions of less than 250 mm of rain per annum, whereas the highest concentrations of subgenera/sections and species occur where the annual rainfall is more than 500 mm. All the species in the region are summer rainfall plants, or if they occur in the winter rainfall area they behave like summer rainfall plants. The different subgenera/sections recognized within the genus differ widely in respect of their water requirements, yet there is a general concentration of taxa in the eastern part of the country where the rainfall is higher than in the west. Nevertheless, the highest concentrations of taxa are not in the areas of highest rainfall, which suggests that topographical diversity is probably the most important factor determining concentrations of taxa. The geographical distribution of each subgenus/section in the FSA region is explained in relation to the total distribution of the subgenus/section. The possible climatic or environmental conditions which may determine the distribution of each subgenus/section are mentioned, and the concentration of species within each subgenus/section is demonstrated by means of maps.

Loma boopsidis. [Descriptions of Fungi and Bacteria].

2020 ◽  
Author(s):  
D. W. Minter
Keyword(s):  
Geographical Distribution ◽  
West Coast ◽  
Conservation Status ◽  
Tropical Africa ◽  
The West ◽  
Host Cytoplasm ◽  
The Family ◽  
Host Nucleus

Abstract A description is provided for Loma boopsidis, which infects fish of the family Sparidae off the west coast of tropical Africa; infections developing in the host cytoplasm (but not in nerve tissues), without diplokarya, and resulting in tumours (also known as 'xenomas') in which the host nucleus is centrally located. Some information on its dispersal and transmission, habitats and conservation status is given, along with details of its geographical distribution (Africa (Senegal)).

scholarly journals Trading in Air Bangis in the 19th Century

2019 ◽  
Vol 31 (1) ◽  
pp. 51
Author(s):  
Junaidi Junaidi ◽  
Ratna Ratna
Keyword(s):  
19Th Century ◽  
West Coast ◽  
Small Scale ◽  
The West ◽  
Early 19Th Century ◽  
Trading Activities ◽  
High Level ◽  
Colonial Government ◽  
The 19Th Century ◽  
Dutch Colonial

This study aims to explain trading activities at the Air Bangis harbor during the Dutch Colonial Government. Since the early 19th century, the Dutch Colonial Government had been more ambitious than before to utilize as much forest and agricultural products as possible in the hinterland of the West Coast of Sumatra. This intention was also supported by the improvement of the functions of harbor cities along the West Coast of Sumatra, including Air Bangis. The improvement per se had allowed a small-scale trade to be upgraded to export-oriented free harbors. The high level of trading activity in the Air Bangis harbor was made possible by its hinterland which is rich in export commodities. Among the types of the export commodities were gold, camphor, myrrh, rattan, dammar, coffee and pepper. The Air Bangis harbor had a role in lifting the spirits of the foreign nations, such as Aceh, VOC, English, and the Dutch Colonial Government, to build their influences in the harbor. The competition often caused friction which resulted in a conflict and power overtaking. The winners would take over the power from the losers, established their hegemony and monopolized the trade in the area of Air Bangis. The prosperity of the maritime activities in Air Bangis reached its peak in the first quarter of the 19th century, but it did not last long. In the last quarter of the 19th century, maritime activities in Air Bangis harbor started to decline. Nevertheless, sea voyage and trading activities in Air Bangis harbor had given a specific color to the maritime world in the West Sumatera Coast.

scholarly journals Photo-grammetric measurements of swimming speed and body length of basking sharks observed around the Hebrides, Scotland

2009 ◽  
Vol 90 (2) ◽  
pp. 361-366 ◽  
Author(s):  
Claire Lacey ◽  
Russell Leaper ◽  
Anna Moscrop ◽  
Douglas Gillespie ◽  
Richard McLanaghan ◽  
...  
Keyword(s):  
Body Length ◽  
Swimming Speed ◽  
West Coast ◽  
Path Length ◽  
Movement Patterns ◽  
Small Scale ◽  
The West ◽  
Total Path Length ◽  
Focal Animal ◽  
Length Measurements

Photo-grammetric techniques developed for measuring body length and small scale movement patterns of cetaceans were applied to surface swimming basking sharks off the west coast of Scotland. These methods removed the need for close approaches, reducing the likelihood of disturbing the focal animal. Average swimming speed was calculated from the total path length between shark locations measured at approximately one minute intervals. These average speeds varied from 0.49 to 0.73 ms−1 for tracks of between 30 and 170 minutes' duration. Body length measurements ranged between 2.35 and 6.43 m. For ten sharks where body length and swimming speed were measured there was a significant correlation between body length (L) and swimming speed (V) expressed as V = 0.36L033.

scholarly journals Trading in Air Bangis in the 19th Century

2019 ◽  
Vol 31 (1) ◽  
pp. 51
Author(s):  
Junaidi Junaidi ◽  
Ratna Ratna
Keyword(s):  
19Th Century ◽  
West Coast ◽  
Small Scale ◽  
The West ◽  
Early 19Th Century ◽  
Trading Activities ◽  
High Level ◽  
Colonial Government ◽  
The 19Th Century ◽  
Dutch Colonial

This study aims to explain trading activities at the Air Bangis harbor during the Dutch Colonial Government. Since the early 19th century, the Dutch Colonial Government had been more ambitious than before to utilize as much forest and agricultural products as possible in the hinterland of the West Coast of Sumatra. This intention was also supported by the improvement of the functions of harbor cities along the West Coast of Sumatra, including Air Bangis. The improvement per se had allowed a small-scale trade to be upgraded to export-oriented free harbors. The high level of trading activity in the Air Bangis harbor was made possible by its hinterland which is rich in export commodities. Among the types of the export commodities were gold, camphor, myrrh, rattan, dammar, coffee and pepper. The Air Bangis harbor had a role in lifting the spirits of the foreign nations, such as Aceh, VOC, English, and the Dutch Colonial Government, to build their influences in the harbor. The competition often caused friction which resulted in a conflict and power overtaking. The winners would take over the power from the losers, established their hegemony and monopolized the trade in the area of Air Bangis. The prosperity of the maritime activities in Air Bangis reached its peak in the first quarter of the 19th century, but it did not last long. In the last quarter of the 19th century, maritime activities in Air Bangis harbor started to decline. Nevertheless, sea voyage and trading activities in Air Bangis harbor had given a specific color to the maritime world in the West Sumatera Coast.

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