TY  - JOUR
T1  - The Potential Suitability of Nocturnally Occurring Plankton Flora in  Earthen Freshwater Nursery Ponds
AU - , E.J. Ansa AU - , M.M.A. Akinwale 
JO  - Research Journal of Applied Sciences
VL  - 2
IS  - 6
SP  - 697
EP  - 703
PY  - 2007
DA  - 2001/08/19
SN  - 1815-932x
DO  - rjasci.2007.697.703
UR  - https://makhillpublications.co/view-article.php?doi=rjasci.2007.697.703
KW  - Phytoplankton
KW  -nocturnal
KW  -suitability
KW  -algal feed
KW  -earthen freshwater
KW  -nursery ponds
AB  - Many microfloral factors of the fish nursery ecosystem act to the favour or detriment of fish larvae at night.  In this experiment, 2 replicates each of three treatment freshwater ponds were tested with varying nutrient  regimes  to  assess  their  impact  on  phytoplankton  populations  at  night.   The first treatment-A (200 m<SUP>2</SUP> surface area supplied 70 kg ha <SUP>1</SUP> month <SUP>1</SUP> pig manure only), treatment-B (200 m<SUP>2</SUP> surface area supplied 70 kg ha <SUP>1</SUP> month <SUP>1</SUP> pig manure, 50 kg ha <SUP>1</SUP> month <SUP>1</SUP> N.P.K [15:15:15] and 30 kg ha <SUP>1</SUP> month <SUP>1</SUP> Urea) and Treatment-C (1500 m<SUP>2</SUP> surface area supplied 1150 kg ha <SUP>1</SUP> month <SUP>1</SUP> commercial grade 40% crude protein compounded feed).  Water replenishment for Treatment A was daily tidal deluge from the New Calabar River while that for treatment B and C was from column well and occasional rains. For 6 months, 36 contrasting phytoplanktons were nocturnally encountered in the whole experiment. Economically important pond flora such as <I>Coelastrum microporum</I>, <I>Pediastrum tetras</I>, <I>Scenedesmus quadricauda</I> were obtained from all treatments while singular occurrences were <I>Coelastrum proboscigera</I>, <I>Closterium venus</I>, <I>Chlamydomonas olifanii</I>, <I>Merismopedia glauca</I>, <I>Cyclotella striata </I>and <I>Melosira italica </I>(treatment-A); <I>Closterium reticulum</I>, <I>Closterium macilentum</I>, <I>Pleodorina carlifornica</I>, <I>Scenedesmus acuminata</I>, <I>Treubaria triappendiculata</I>, <I>Aphanotheca clathrata</I>, <I>Gleocapsa limnetica</I>, <I>Microcystis pulverea</I> and <I>Spirulina gracile</I>, <I>Trachelomonas hispida</I>, <I>Cyclotella antiqua</I>, <I>Fragillaria intermedia</I>, <I>Melosira varians</I> and <I>Tribonema viride (</I>treatment-B); <I>Selenastrium bibriaianum</I>, <I>Volvox globator</I>, <I>Spirulina principes</I>, <I>Euglena wangi</I>, <I>Phacus longicauda</I>, <I>Phacus pleuronectes</I> and <I>Synedra ulna </I>(treatment C). These indicate their potential mono- and polyculture as well as the varying nutritional and ecological fortune derivable from these nutrients in practice.
ER  -