scholarly journals The Ocean Pout, Zoarces americanus, and the Ocean Sunfish, Mola mola: Additions to the Marine Ichthyofauna of the Lower Saint John River System, New Brunswick, with a Summary of Marine Fish Reported from the Estuary

2013 ◽  
Vol 127 (1) ◽  
pp. 38 ◽  
Author(s):  
Donald F. McAlpine
Keyword(s):  
New Brunswick ◽  
River System ◽  
Marine Species ◽  
Sensu Stricto ◽  
Marine Fishes ◽  
Ocean Sunfish ◽  
System A ◽  
Mola Mola ◽  
Saint John ◽  
The Status

Recent records for the Ocean Pout, Zoarces americanus (collected 11 February 2011), and the Ocean Sunfish, Mola mola (photograph taken 24 June 2012), in the lower Saint John River system, New Brunswick, add to the list of marine fishes reported from this oceanographically unique estuary system. A total of 62 species of strictly freshwater, anadromous, catadromous, and marine fishes have now been recorded in the Saint John River system, with 49 of these in the Saint John River sensu stricto. The Acadian Redfish, Sebastes faciatus, a species assessed as threatened by the Committee on the Status of Endangered Wildlife in Canada, appears to be among these. While strictly marine fishes may contribute relatively little to the overall biomass of fishes in the Saint John River system, marine species account for 30.6% of the biodiversity of fishes in the river to date. This suggests that marine fishes may be a more significant component of the ichthyofauna of the lower Saint John River system than is generally recognized.

scholarly journals Late Wisconsinan and Holocene development of Grand Lake Meadows area and southern reaches of the Saint John River Valley, New Brunswick, Canada

2015 ◽  
Vol 51 (1) ◽  
pp. 206 ◽  
Author(s):  
Bruce E. Broster ◽  
Pamela J. Dickinson
Keyword(s):  
Phase I ◽  
New Brunswick ◽  
Radiocarbon Dating ◽  
River System ◽  
Phase Iii ◽  
Maximum Phase ◽  
Marine Transgression ◽  
Saint John ◽  
Phases Of Development ◽  
Late Wisconsinan

<p align="LEFT">A 67 m near-continuous stratigraphic core was recovered from drilling at Grand Lake Meadows, located near the junction of Grand Lake and the Saint John River, approximately 40 km south of Fredericton, New Brunswick. From analyses of recovered samples and finite radiocarbon dating, four phases of development of the study site and surrounding environs were identified to have occurred following the Late Wisconsinan glacial maximum. Phase I, related to the formation of the DeGeer Sea, commenced more than 15 000 calyBP from deglaciation accompanied by marine transgression. Phase II began ~14 000 calyBP and continued until approximately ~8000 calyBP during which time there was major isostatic readjustment in the region and formation of a stratified, mostly brackish, ancestral Grand Lake and transformation into a mostly freshwater, Lake Acadia. Phase III began shortly after 8000 calyBP and continued until after 3000 calyBP accompanied by return of the Saint John River to a fluvialdominated system after down-cutting an outlet at the Reversing Falls gorge, and draining much of Lake Acadia. During phase IV, ~3000 calyBP to present, estuarine conditions were initiated as marine water advanced upstream over the Reversing Falls, leading to the development of the modern river system and Grand Lake Meadows.</p>

scholarly journals First record of Eurasian Water-milfoil, Myriophyllum spicatum, for the Saint John River, New Brunswick

2019 ◽  
Vol 132 (3) ◽  
pp. 231-237 ◽  
Author(s):  
Meghann Bruce ◽  
Tommi Linnansaari ◽  
R. Allen Curry
Keyword(s):  
New Brunswick ◽  
Native Species ◽  
Myriophyllum Spicatum ◽  
River System ◽  
First Record ◽  
Large River ◽  
Ecosystem Functions ◽  
Macrophyte Species ◽  
Saint John ◽  
Invasive Aquatic Plants

Eurasian Water-milfoil (Myriophyllum spicatum L.) is regarded by conservation practitioners as one of the most challenging invasive aquatic plants to manage. Owing to its broad tolerance to environmental conditions, vegetative propagation, and rapid establishment and growth, M. spicatum introductions have the potential to drastically alter macrophyte species assemblages via a loss of native species and their respective ecosystem functions. Following the discovery of a single specimen of M. spicatum in the Saint John River, near Fredericton, New Brunswick (Canada) we further investigated the localized distribution of this nonindigenous species. Thirteen areas were identified as potential M. spicatum habitat and were surveyed by wading or snorkeling. Specimens of M. spicatum were collected and morphological identifications were verified through genetic analyses (ITS2; rbcLa). The results of our investigation confirm the presence of M. spicatum at six different locations within the Saint John River. Here we discuss the implications of this discovery in the context of the contiguous aquatic habitats along a large river system.

scholarly journals Introduction of Southern White River Crayfish (Procambarus zonangulus) to New Brunswick

2021 ◽  
Vol 134 (4) ◽  
pp. 375-378
Author(s):  
Donald F. McAlpine ◽  
Christopher B. Connell ◽  
Pamela D. Seymour
Keyword(s):  
Invasive Species ◽  
New Brunswick ◽  
River System ◽  
Native Fish ◽  
White River ◽  
The Third ◽  
Saint John ◽  
Native Crayfish ◽  
First Time ◽  
Privately Owned

Southern White River Crayfish (Procambarus zonangulus), an aquatic, potentially invasive species, is documented from New Brunswick for the first time. It was found in a small, privately owned, lake in the Saint John River system that was apparently stocked for recreational purposes with non-native fish and the crayfish. Procambarus zonangulus has successfully overwintered at the site for at least a year and, more likely, for several years. This is the third species of non-native crayfish recorded in New Brunswick, joining Spiny-cheeked Crayfish (Faxonius limosus) and Virile Crayfish (Faxonius virilis). This is also the first persisting introduction for the genus Procambarus in Canada of which we are aware.

scholarly journals The Fathead Minnow, Pimephales promelas, in New Brunswick

2005 ◽  
Vol 119 (3) ◽  
pp. 351 ◽  
Author(s):  
Dale J. Hood ◽  
Rudolph F. Stocek
Keyword(s):  
New Brunswick ◽  
Fathead Minnow ◽  
Pimephales Promelas ◽  
River System ◽  
Saint John

A second record for the occurrence of the Fathead Minnow (Pimephales promelas) in New Brunswick, the first for the southwest portion of the province, is reported. This is the first documented occurrence of the species in the province in 44 years, and the first indication that the Fathead Minnow occurs outside the upper Saint John River system in New Brunswick.

scholarly journals Occurrence of the Chinese mystery snail, Cipangopaludina chinensis (Gray, 1834) (Mollusca: Viviparidae) in the Saint John River system, New Brunswick, with review of status in Atlantic Canada

2016 ◽  
Vol 5 (3) ◽  
pp. 149-154 ◽  
Author(s):  
Donald McAlpine ◽  
Dwayne Lepitzki ◽  
Frederick Schueler ◽  
Fenning McAlpine ◽  
Andrew Hebda ◽  
...  
Keyword(s):  
New Brunswick ◽  
River System ◽  
Atlantic Canada ◽  
Saint John ◽  
Chinese Mystery Snail

Life-cycle duration, growth and spawning times of five species of atherinidae (Teleostei) found in a Western Australian estuary

1983 ◽  
Vol 34 (2) ◽  
pp. 287 ◽  
Author(s):  
JD Prince ◽  
IC Potter
Keyword(s):  
Life Cycle ◽  
River System ◽  
Marine Species ◽  
Sensu Stricto ◽  
Cycle Duration ◽  
Length Frequency ◽  
The Times ◽  
System Length ◽  
Australian Estuary ◽  
Marine Embayment

Five species of atherinid were collected monthly from the estuary of the Swan-Avon river system. Length-frequency data and gonadosomic indices showed that Atherinosoma presbyteroides, A. elongata, A. wallacei and Allanetta mugiloides typically have a 1-year life cycle and generally reach maturity at total lengths of 40-85 mm. The mean length of the mature females was significantly greater than that of the mature males in each Atherinosoma species, but not in Allanetta mugiloides. The fifth species, Pranesus ogilbyi, was often represented by many individuals with far greater total lengths (100-150 mm) than were found in the other four species, a feature that reflected the presence of two year classes. Length-frequency and gonadosomic data indicated that all five atherinid species breed over protracted periods during spring and summer. Values for the gonadosomic index and the absence of local marine populations of Atherinosoma elongata, Allanetta mugiloides and Atherinosoma wallacei confirmed that the populations of these species in the Swan-Avon are estuarine or estuarine-inland water sensu stricto. Gonadosomic values for the marine species A. presbyteroides and P. ogilbyi, allied with the times of disappearance of larger individuals from the estuary, suggested that only the former of these two species may breed to any extent in the estuary. Length-frequency histograms showed that the populations of A. presbyteroides and P. ogilbyi in the Swan-Avon are more heterogeneous than those of the same species in a nearby marine embayment.

Impacts of urbanization on river system structure: a case study on Qinhuai River Basin, Yangtze River Delta

2014 ◽  
Vol 70 (4) ◽  
pp. 671-677 ◽  
Author(s):  
Xiaomin Ji ◽  
Youpeng Xu ◽  
Longfei Han ◽  
Liu Yang
Keyword(s):  
River Basin ◽  
River System ◽  
Yangtze River Delta ◽  
System Structure ◽  
River Channels ◽  
Stream Structure ◽  
Impervious Area ◽  
The Status ◽  
Urbanized Areas ◽  
Qinhuai River

Stream structure is usually dominated by various human activities over a short term. An analysis of variation in stream structure from 1979 to 2009 in the Qinhuai River Basin, China, was performed based on remote sensing images and topographic maps by using ArcGIS. A series of river parameters derived from river geomorphology are listed to describe the status of river structure in the past and present. Results showed that urbanization caused a huge increase in the impervious area. The number of rivers in the study area has decreased and length of rivers has shortened. Over the 30 years, there was a 41.03% decrease in river length. Complexity and stability of streams have also changed and consequently the storage capacities of river channels in intensively urbanized areas are much lower than in moderately urbanized areas, indicating a greater risk of floods. Therefore, more attention should be paid to the urban disturbance to rivers.

Evaluation of catchment hydrology and soil loss in non-perennial river system: a case study of Subarnarekha Basin, India

2021 ◽  
Author(s):  
Rituparna Acharyya ◽  
Niloy Pramanick ◽  
Subham Mukherjee ◽  
Subhajit Ghosh ◽  
Abhra Chanda ◽  
...  
Keyword(s):  
Soil Loss ◽  
River System ◽  
Catchment Hydrology ◽  
System A

Stable isotopes challenge the perception of ocean sunfish Mola mola as obligate jellyfish predators

2011 ◽  
Vol 80 (1) ◽  
pp. 225-231 ◽  
Author(s):  
J. Syväranta ◽  
C. Harrod ◽  
L. Kubicek ◽  
V. Cappanera ◽  
J. D. R. Houghton
Keyword(s):  
Stable Isotopes ◽  
Ocean Sunfish ◽  
Mola Mola

Occurrence of ocean sunfish, Mola mola near fronts in the western English Channel

2002 ◽  
Vol 82 (5) ◽  
pp. 927-928 ◽  
Author(s):  
D.W. Sims ◽  
E.J. Southall
Keyword(s):  
Water Masses ◽  
English Channel ◽  
Ocean Sunfish ◽  
Total Length ◽  
Mola Mola ◽  
Mixed Water ◽  
Surface Occurrence

Surface occurrence of ocean sunfish (Mola mola) was recorded during summer (May–September) in the western English Channel off Plymouth over a six-year period between 1995 and 2001. Fifteen individuals of between 0.5–0.7 m estimated total length were sighted during 1651 hours of observation. Nearly all sightings (93%) occurred in June and July in water between 13 and 17°C. Sunfish were mostly associated with frontal and stratified water masses (86%) rather than in cooler, mixed water.

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